Retired Brick Sets
LEGO 42123 McLaren Senna GTR

42123McLaren Senna GTR

  • 2021released
  • 830pieces
  • Technictheme
Typical new & sealed £50.88 from £23.22 · 6.1p/piece
Typical used & complete £27.92 from £13.06 · 3.4p/piece
Best trusted deal right now£13.08 Used · not stated · · 45% below typical View on eBay →
Updated 2h ago · 150 listings found

Price history

eBay UK · median Buy It Now asking price

We started tracking this set on 18 Oct 2026. The chart fills in as we record prices each day.

150 listings

  1. LEGO Technic 42123 McLaren Senna GTR 830pcs 18+ 2021 Without Box Manual
    UK Used · not stated No box 📘 Instructions ⏱ 13h 21m · 2 bids
    paukean-4 · 100% · 329 feedback
    £12.48 incl. £2.94 postage 1.5p/piece Current bid
  2. LEGO Technic McLaren Senna GTR (Set Number 42123) Model Car. Built. No Box. Used
    UK New & sealed No box 📘 Instructions ⏱ 2d 12h · 0 bids
    nm44sb · 100% · 181 feedback
    £12.96 incl. £3.38 postage 1.6p/piece Current bid
  3. LEGO Technic 42123 McLaren Senna GTR Complete Set 830pcs 18+ No Box
    UK Used · complete No box
    theo-3824 · new seller, no feedback yet · ⚠ check carefully
    £13.06 incl. £2.26 postage 1.6p/piece ⚠ 53% below · too good to be true?
  4. LEGO 42123 LEGO Technic McLaren Senna GTR
    UK Used · not stated
    maxsbricks · 100% · 653 feedback
    £13.08 incl. £2.62 postage 1.6p/piece 45% below typical
  5. Lego Technic McLaren Senna 42123
    UK Used · not stated
    ell_6894 · 100% · 11 feedback
    £13.36 incl. £2.26 postage 1.6p/piece 44% below typical
  6. LEGO Technic McLaren Senna GTR 42123
    UK Used · not stated ⏱ 21h 33m · 0 bids
    michael_doc · 100% · 41 feedback
    £14.18 incl. £3.38 postage 1.7p/piece Current bid
  7. LEGO Technic 42123 Car
    UK Used · not stated ⏱ 7d 19h · 0 bids
    carebear0709 · 99.4% · 1,062 feedback
    £14.20 incl. £3.40 postage 1.7p/piece Current bid
  8. LEGO TECHNIC: McLaren Senna GTR (42123)
    UK Used · not stated
    theo8910 · 100% · 10 feedback
    £15.20 incl. £2.26 postage 1.8p/piece 37% below typical
  9. LEGO TECHNIC: McLaren Senna GTR (42123) - With Instructions
    UK Used · not stated 📘 Instructions
    hawktalon2009 · 100% · 45 feedback
    £15.93 incl. £2.26 postage 1.9p/piece 34% below typical
  10. LEGO Technic 42123 McLaren Senna GTR
    UK Used · not stated
    gdxm-87 · 99.9% · 1,507 feedback
    £16.27 incl. £2.26 postage 2.0p/piece 32% below typical
  11. Lego®42123 McLaren Senna GTR
    UK Used · not stated
    we-buy-bricks · 99.4% · 10,614 feedback
    £17.17 free postage 2.1p/piece 28% below typical
  12. LEGO 42123 Technic McLaren Senna GTR
    UK Used · not stated ⏱ 5d 14h · 0 bids
    alcocjonat · 100% · 74 feedback
    £17.94 incl. £2.94 postage 2.2p/piece Current bid
  13. LEGO Technic McLaren Senna GTR 42123 Racing Sports Collectable Model Car
    UK Used · not stated
    legilber_56 · 100% · 428 feedback
    £18.04 incl. £2.26 postage 2.2p/piece 25% below typical
  14. LEGO Technic 42123 McLaren Senna
    UK Used · not stated
    fabricologist · 100% · 1,527 feedback
    £18.23 incl. £2.62 postage 2.2p/piece 24% below typical
  15. LEGO Technic 42123 McLaren Senna GTR
    UK Used · not stated
    mjadirect · 99.8% · 6,076 feedback
    £18.29 free postage 2.2p/piece 24% below typical
  16. LEGO Technic McLaren Senna GTR 42123
    UK New & sealed 📦 Box 📘 Instructions ⏱ 1d 18h · 3 bids
    bluenose-10 · 100% · 3,094 feedback
    £18.40 incl. £3.38 postage 2.2p/piece Current bid
  17. LEGO TECHNIC: McLaren Senna GTR (42123)
    UK Used · not stated
    karamk123 · 100% · 632 feedback
    £18.41 incl. £2.26 postage 2.2p/piece 23% below typical
  18. LEGO TECHNIC: McLaren Senna GTR (42123)
    UK Used · not stated
    jaybrewin · 98.8% · 94 feedback
    £18.41 incl. £2.26 postage 2.2p/piece 23% below typical
  19. LEGO Technic 42123 McLaren Senna
    UK Used · not stated
    specs223 · 100% · 99 feedback
    £18.41 incl. £2.26 postage 2.2p/piece 23% below typical
  20. LEGO Technic McLaren Senna GTR 42123 Complete Set 830pcs Age 10+ 2021
    UK Used · complete
    zuziswiatkowsk0 · 100% · 14 feedback
    £18.41 incl. £2.26 postage 2.2p/piece 34% below typical
  21. LEGO Technic McLaren Senna GTR 42123 NO BOX OR MANUAL
    UK Used · not stated No box 📘 Instructions
    melodsh0 · 97.7% · 41 feedback
    £18.41 incl. £2.26 postage 2.2p/piece 23% below typical
  22. LEGO Technic McLaren Senna GTR 42123
    UK Used · not stated
    ampollar-49 · 60% · 20 feedback · ⚠ check carefully
    £18.61 incl. £2.46 postage 2.2p/piece 22% below typical
  23. LEGO Technic McLaren Senna GTR 42123 Complete Set
    UK Used · complete
    hufow0 · 100% · 15 feedback
    £19.45 incl. £2.26 postage 2.3p/piece 30% below typical
  24. LEGO Technic 42123 McLaren Senna GTR Complete No Box or Instructions
    UK Used · complete No box 📘 Instructions
    ioca_32 · 99.5% · 2,837 feedback
    £19.48 incl. £2.26 postage 2.3p/piece 30% below typical
  25. LEGO Technic 42123 McLaren Senna GTR
    UK Used · not stated ⏱ 6d 17h · 0 bids
    kayl75 · 100% · 434 feedback
    £19.53 incl. £3.38 postage 2.4p/piece Current bid
  26. LEGO TECHNIC: McLaren Senna GTR (42123)
    UK Used · not stated
    orientalfigurine · 100% · 4,455 feedback
    £19.67 incl. £2.46 postage 2.4p/piece 18% below typical
  27. LEGO Technic McLaren Senna GTR 42123 Used Complete Set 830 Pieces
    UK Used · complete
    pate-tash · 100% · 348 feedback
    £19.76 incl. £2.26 postage 2.4p/piece 29% below typical
  28. LEGO TECHNIC McLAREN SENNA GTR (42123) FREE POSTAGE!
    UK Used · not stated
    leftywilbury.2007 · 100% · 245 feedback
    £20.00 free postage 2.4p/piece 17% below typical
  29. LEGO Technic 42123 McLaren Senna GTR 830pcs 10+ Box & Instructions
    UK Used · not stated 📦 Box 📘 Instructions
    dain-5930 · 100% · 114 feedback
    £20.55 incl. £2.26 postage 2.5p/piece 14% below typical
  30. LEGO TECHNIC: McLaren Senna GTR (42123)
    UK Used · not stated
    ujhel_de · 99% · 847 feedback
    £20.75 incl. £2.46 postage 2.5p/piece 13% below typical
  31. LEGO TECHNIC: McLaren Senna GTR (42123)
    UK Used · not stated ⏱ 6d 9h · 0 bids
    johntrumpet1970 · 100% · 256 feedback
    £21.30 incl. £5.15 postage 2.6p/piece Current bid
  32. lego 42123 technic mclaren Senna
    UK Used · not stated
    willianeville-jone-0 · 100% · 373 feedback
    £21.62 incl. £2.26 postage 2.6p/piece 10% below typical
  33. LEGO McLaren Senna GTR Technic 42123
    UK Used · not stated
    h4rv3y_m4rch · 100% · 116 feedback
    £22.26 incl. £2.26 postage 2.7p/piece 7% below typical
  34. LEGO 42123 Technic McLaren Senna GTR Collectible Toy Car
    UK Used · not stated
    magic_xxxx · 100% · 3,833 feedback
    £22.58 incl. £2.26 postage 2.7p/piece 6% below typical
  35. LEGO Technic McLaren Senna GTR #42123 Complete Set 830p, 10+, Retired
    UK New & sealed 📦 Box 📘 Instructions
    mortimersupply · 100% · 2 feedback · ⚠ check carefully
    £23.22 incl. £2.26 postage 2.8p/piece ⚠ 54% below · too good to be true?
  36. LEGO Technic 42123 McLaren Senna GTR
    UK Used · not stated
    chamonesuperstar · 100% · 3,268 feedback
    £23.58 incl. £3.59 postage 2.8p/piece About typical
  37. LEGO Technic 42123 McLaren Senna GTR Car Building Set
    UK New & sealed 📦 Box 📘 Instructions
    matthew_lowdon · 100% · 183 feedback
    £23.75 incl. £2.26 postage 2.9p/piece ⚠ 53% below · too good to be true?
  38. LEGO TECHNIC: McLaren Senna GTR (42123)
    UK Used · not stated
    bman1011979 · 100% · 749 feedback
    £23.75 incl. £2.26 postage 2.9p/piece About typical
  39. LEGO Technic McLaren Senna GTR™ (42123)
    UK Used · not stated
    stajerjanos · 100% · 100 feedback
    £23.75 incl. £2.26 postage 2.9p/piece About typical
  40. LEGO Technic 42123 McLaren Senna GTR 830pc 10+ Incomplete w/ Box Instructions
    UK New & sealed 📦 Box 📘 Instructions
    jos_584821 · 100% · 9 feedback · ⚠ check carefully
    £23.76 incl. £2.26 postage 2.9p/piece ⚠ 53% below · too good to be true?
  41. LEGO Technic McLaren Senna GTR 42123
    UK Used · not stated
    tottle26 · 93.8% · 408 feedback · ⚠ check carefully
    £23.76 incl. £2.26 postage 2.9p/piece About typical
  42. LEGO Technic McLaren Senna GTR 42123 Used Complete Set 830 Pieces
    UK New & sealed 📦 Box 📘 Instructions
    hamebb_0 · 100% · 7 feedback · ⚠ check carefully
    £23.76 incl. £2.26 postage 2.9p/piece ⚠ 53% below · too good to be true?
  43. LEGO Technic 42123 McLaren Senna GTR McLaren Set 830 pcs 10+ Complete Set
    UK Used · complete
    gra817 · 100% · 803 feedback
    £23.76 incl. £2.26 postage 2.9p/piece 15% below typical
  44. LEGO McLaren Senna GTR 42123, Complete Set, No Box But Instruction Book Included
    UK Used · complete No box
    nja6403-hybrettp3 · 100% · 83 feedback
    £23.76 incl. £2.26 postage 2.9p/piece 15% below typical
  45. LEGO TECHNIC: McLaren Senna GTR (42123)
    UK Used · not stated
    bembis7 · 99.1% · 745 feedback
    £23.76 incl. £2.26 postage 2.9p/piece About typical
  46. Lego Technic McLaren Senna GTR™ 42123 Used
    UK Used · not stated
    dandanthetrainman · 100% · 62 feedback
    £23.76 incl. £2.26 postage 2.9p/piece About typical
  47. LEGO Technic McLaren Senna GTR 42123 830 pcs Age 7+ Without Box
    UK Used · not stated No box
    tinks_kirst · 100% · 332 feedback
    £23.76 incl. £2.26 postage 2.9p/piece About typical
  48. LEGO 42123 Technic McLaren Senna GTR Collectible. Used, Not In Original Box
    UK Used · not stated 📦 Box
    barmit_35 · 100% · 88 feedback
    £23.76 incl. £2.26 postage 2.9p/piece About typical
  49. LEGO Technic McLaren Senna GTR 42123
    UK Used · not stated
    jakyz2000 · 100% · 139 feedback
    £23.76 incl. £2.26 postage 2.9p/piece About typical
  50. LEGO MclarenSenna TECHNIC: McLaren Senna GTR (42123) NoBox
    UK Used · not stated
    denikaa23 · 100% · 123 feedback
    £23.76 incl. £2.26 postage 2.9p/piece About typical
  51. LEGO Technic McLaren Senna GTR 42123 built with box & instructions mirror missin
    UK Used · not stated 📦 Box 📘 Instructions
    mdk2-65 · 99.6% · 940 feedback
    £23.76 incl. £2.26 postage 2.9p/piece About typical
  52. LEGO Technic 42123 McLaren Senna GTR 830pcs Age 10+ Box Brick Separator
    UK Used · not stated
    adsc04 · 100% · 11 feedback
    £23.76 incl. £2.26 postage 2.9p/piece About typical
  53. LEGO TECHNIC: McLaren Senna GTR (42123)
    UK Used · not stated
    daibread81 · 100% · 713 feedback
    £23.96 incl. £2.46 postage 2.9p/piece About typical
  54. LEGO Technic 42123 McLAREN SENNA GTR - Boxed and 100% Complete with Instructions
    UK Used · complete 📦 Box 📘 Instructions
    salesoftheunexpected · 99.9% · 5,888 feedback
    £23.98 incl. £3.99 postage 2.9p/piece 14% below typical
  55. LEGO TECHNIC: McLaren Senna GTR (42123)
    UK Used · not stated
    rabiddonkey1574 · 100% · 119 feedback
    £24.00 free postage 2.9p/piece About typical
  56. LEGO TECHNIC: McLaren Senna GTR - Set 42123 (used)
    UK Used · not stated
    barryatthebarn · 100% · 4,271 feedback
    £24.07 incl. £2.62 postage 2.9p/piece About typical
  57. LEGO TECHNIC: McLaren Senna GTR (42123)
    UK Used · not stated
    mikvik2007 · 100% · 112 feedback
    £24.09 incl. £3.42 postage 2.9p/piece About typical
  58. LEGO TECHNIC 42123 McLaren Senna GTR, Mint, Inc Box & Instructions
    UK Used · not stated 📦 Box 📘 Instructions
    actonifa · 100% · 964 feedback
    £24.12 incl. £2.62 postage 2.9p/piece About typical
  59. LEGO Technic McLaren Senna GTR 42123
    UK Used · not stated
    deac0n-1 · 94.4% · 45 feedback · ⚠ check carefully
    £24.34 incl. £4.98 postage 2.9p/piece About typical
  60. Lego Technic: McLaren Senna GTR (42123) Includes Box & Instructions
    UK Used · not stated 📦 Box 📘 Instructions
    forgetmenotchildrenshospice · 99.7% · 15,395 feedback
    £24.79 incl. £4.80 postage 3.0p/piece About typical
  61. LEGO TECHNIC: McLaren Senna GTR (42123)
    UK Used · not stated
    jessi-blood · 100% · 168 feedback
    £24.80 incl. £2.26 postage 3.0p/piece About typical
  62. LEGO TECHNIC: McLaren Senna GTR (42123)
    UK Used · not stated
    3603davids · 100% · 2,454 feedback
    £24.92 incl. £3.42 postage 3.0p/piece About typical
  63. LEGO TECHNIC: McLaren Senna GTR (42123)
    UK Used · not stated
    is-2699 · 100% · 5 feedback · ⚠ check carefully
    £24.92 incl. £3.42 postage 3.0p/piece About typical
  64. LEGO TECHNIC: McLaren Senna GTR (42123)
    UK Used · not stated
    niamhburkeee · 100% · 46 feedback
    £24.92 incl. £3.42 postage 3.0p/piece About typical
  65. Lego McLaren Senna 42123 complete with box and instructions
    UK Used · complete 📦 Box 📘 Instructions
    glyari_0 · 100% · 710 feedback
    £25.16 incl. £2.62 postage 3.0p/piece 10% below typical
  66. LEGO TECHNIC 42123 MCLAREN SENNA GTR 100% (EXCELLENT CONDITION)!!!
    UK Used · not stated
    slei.dani · 100% · 1,426 feedback
    £25.21 incl. £2.26 postage 3.0p/piece 5% above typical
  67. LEGO 42123 McLaren Senna GTR | Retired | Built
    UK Used · not stated
    camre7796 · 100% · 37 feedback
    £25.84 incl. £2.26 postage 3.1p/piece 8% above typical
  68. LEGO TECHNIC: MODEL: McLAREN SENNA GTR (42123)
    UK Used · not stated
    iha24 · 100% · 5,627 feedback
    £27.23 incl. £2.62 postage 3.3p/piece 14% above typical
  69. LEGO Technic 42123 McLaren Senna GTR with Instructions (no box)
    UK Used · not stated No box 📘 Instructions
    k_prab19 · 100% · 6 feedback · ⚠ check carefully
    £27.25 incl. £2.26 postage 3.3p/piece 14% above typical
  70. LEGO McLaren Senna GTR 42123
    UK Used · not stated
    jamepag77 · 99.4% · 1,449 feedback
    £27.92 incl. £2.26 postage 3.4p/piece 17% above typical
  71. LEGO Technic 42123 McLaren Senna GTR Complete Set 830pcs Box & Instructions
    UK Used · complete 📦 Box 📘 Instructions
    luke1987clapton · 100% · 46 feedback
    £27.92 incl. £2.26 postage 3.4p/piece About typical
  72. Lego Technic 42123 McLaren Senna GTR Collectible Toy Car
    UK Used · not stated
    prnr22 · 100% · 60 feedback
    £28.04 incl. £3.42 postage 3.4p/piece 17% above typical
  73. LEGO Technic 42123 McLaren Senna GTR
    UK Used · not stated
    maca_9573 · 100% · 53 feedback
    £28.96 incl. £2.26 postage 3.5p/piece 21% above typical
  74. LEGO Technic McLaren Senna GTR Set 42123 Complete Set with Instructions
    UK Used · complete 📘 Instructions
    reggie-38 · 100% · 336 feedback
    £29.16 incl. £2.46 postage 3.5p/piece About typical
  75. LEGO TECHNIC: McLaren Senna GTR (42123)
    UK Used · not stated
    kirstinker · 100% · 598 feedback
    £29.16 incl. £2.46 postage 3.5p/piece 22% above typical
  76. LEGO Technic McLaren Senna GTR 42123 100% Complete With Instructions And Box
    UK Used · complete 📘 Instructions
    ze-7477 · 100% · 17 feedback
    £29.99 free postage 3.6p/piece 7% above typical
  77. LEGO TECHNIC Mclaren Senna GTR 42123 - Ideal Christmas present
    UK New & sealed 📦 Box 📘 Instructions ⏱ 6d 18h · 0 bids
    actionbook345t · 100% · 1,514 feedback
    £30.08 incl. £3.38 postage 3.6p/piece Current bid
  78. LEGO TECHNIC: McLaren Senna GTR (42123)
    UK Used · not stated
    jaru-2057 · 100% · 8 feedback · ⚠ check carefully
    £30.41 incl. £3.71 postage 3.7p/piece 27% above typical
  79. LEGO Technic McLaren Senna GTR 42123 – Built Once – Complete with Box.
    UK New & sealed 📦 Box 📘 Instructions
    davidrobind2012 · 100% · 13 feedback
    £32.00 incl. £2.46 postage 3.9p/piece 37% below typical
  80. LEGO Technic, 42123 McLaren Sanna GTR. 830pcs, 2021, BNISB.
    UK New & sealed 📦 Box 📘 Instructions ⏱ 3d 7h · 0 bids
    k4wgb · 100% · 18,132 feedback
    £32.10 incl. £3.10 postage 3.9p/piece Current bid
  81. LEGO Technic McLaren Senna GTR 42123 Building Kit with Instructions Manual
    UK Used · not stated 📘 Instructions
    jespyl-0 · 100% · 112 feedback
    £32.25 incl. £2.26 postage 3.9p/piece 35% above typical
  82. LEGO TECHNIC: McLaren Senna GTR (42123)
    UK Used · not stated
    caluboot-0 · 100% · 11 feedback
    £32.80 incl. £6.10 postage 4.0p/piece 37% above typical
  83. LEGO TECHNIC - 42123 - MCLAREN SENNA GTR - GREAT CONDITION - INC INSTRUCTIONS
    UK Used · not stated 📘 Instructions
    ★ Top Rated bobsbrickstuff · 100% · 3,090 feedback
    £32.95 free postage 4.0p/piece 38% above typical
  84. LEGO Technic McLaren Senna GTR 42123 - Brand New & Sealed - Box Damaged
    UK New & sealed 📦 Box 📘 Instructions
    flipne · 98.5% · 2,401 feedback
    £34.00 free postage 4.1p/piece 33% below typical
  85. LEGO Technic McLaren Senna GTR Set 42123 Complete Set with Instructions
    UK Used · complete 📘 Instructions
    guy_ponder · 100% · 1 feedback · ⚠ check carefully
    £34.16 incl. £2.26 postage 4.1p/piece 22% above typical
  86. LEGO Technic McLaren Senna GTR 42123 Complete Set
    UK Used · complete
    whisky_blue · 100% · 2,584 feedback
    £34.16 incl. £2.26 postage 4.1p/piece 22% above typical
  87. Prebuilt McLaren Senna GTR 42123
    UK Used · not stated
    2011bradleyk · 100% · 474 feedback
    £34.16 incl. £2.26 postage 4.1p/piece 43% above typical
  88. LEGO Technic McLaren Senna GTR 42123 Building Kit with Instruction Manual
    UK Used · not stated 📘 Instructions
    boydenmb · 100% · 187 feedback
    £34.36 incl. £2.46 postage 4.1p/piece 43% above typical
  89. LEGO TECHNIC: McLaren Senna GTR (42123)
    UK Used · not stated
    julianock19 · 100% · 308 feedback
    £34.36 incl. £2.46 postage 4.1p/piece 43% above typical
  90. LEGO Technic McLaren Senna GTR 42123
    UK New & sealed 📦 Box 📘 Instructions ⏱ 3d 19h · 0 bids
    astvaitkunien_0 · 99.9% · 1,259 feedback
    £35.28 incl. £3.38 postage 4.3p/piece Current bid
  91. LEGO TECHNIC: McLaren Senna GTR (42123) Amazing condition with box and manual
    UK Used · not stated 📦 Box 📘 Instructions
    jama8580 · 93.8% · 32 feedback · ⚠ check carefully
    £35.32 incl. £3.42 postage 4.3p/piece 47% above typical
  92. LEGO Technic McLaren Senna GTR 42123 100% Complete With Instructions And Box
    UK Used · complete 📘 Instructions
    kipark95 · 100% · 2 feedback · ⚠ check carefully
    £35.72 incl. £2.26 postage 4.3p/piece 28% above typical
  93. LEGO TECHNIC: McLaren Senna GTR (42123)
    UK Used · not stated
    empax-8 · 93.3% · 44 feedback · ⚠ check carefully
    £35.92 incl. £2.46 postage 4.3p/piece 50% above typical
  94. LEGO TECHNIC: Mclaren Senna Gtr™ (42123) Pre-Owned Good Condition Complete Boxed
    UK Used · complete 📦 Box
    paham-8968 · 100% · 114 feedback
    £37.09 free postage 4.5p/piece 33% above typical
  95. LEGO Technic 42123 McLaren Senna GTR 830 pcs Age 10+
    UK New & sealed 📦 Box 📘 Instructions
    mikey_1109 · 99.7% · 1,059 feedback
    £37.12 incl. £2.62 postage 4.5p/piece 27% below typical
  96. LEGO Technic 42123 McLaren Senna GTR 830pc Set w/ Box & Instructions 10+
    UK Used · not stated 📦 Box 📘 Instructions
    sjjrbn.28 · new seller, no feedback yet · ⚠ check carefully
    £39.35 incl. £2.26 postage 4.7p/piece 64% above typical
  97. LEGO Technic 42123 McLaren Senna GTR – Used Complete – retired set
    UK Used · complete
    bigveg88 · 100% · 346 feedback
    £39.35 incl. £2.26 postage 4.7p/piece 41% above typical
  98. LEGO Technic McLaren Senna GTR 42123 830pcs Car Set Age 10+ 2021
    UK New & sealed 📦 Box 📘 Instructions
    north_memorabilia · 100% · 7 feedback · ⚠ check carefully
    £39.36 incl. £2.26 postage 4.7p/piece 23% below typical
  99. LEGO Technic McLaren Senna GTR 42123 Complete Building Set, Instructions & Box
    UK Used · complete 📘 Instructions
    dalin-li-u8al02gbc · 100% · 53 feedback
    £39.36 incl. £2.26 postage 4.7p/piece 41% above typical
  100. LEGO TECHNIC: McLaren Senna GTR (42123)
    UK Used · not stated
    3946paul · 100% · 224 feedback
    £39.56 incl. £2.46 postage 4.8p/piece 65% above typical
  101. LEGO Technic 42123 McLaren Senna GTR - Retired Brand New & Sealed (Damaged Box)
    UK New & sealed 📦 Box 📘 Instructions
    dhjd85 · 100% · 1,594 feedback
    £39.72 incl. £2.62 postage 4.8p/piece 22% below typical
  102. Lego 42123 Technic McLaren Senna GTR
    UK Used · not stated
    hunters1984 · 100% · 1,501 feedback
    £40.68 incl. £2.69 postage 4.9p/piece 70% above typical
  103. LEGO TECHNIC: McLaren Senna GTR (42123) Complete, box & instructions
    UK Used · complete 📦 Box 📘 Instructions
    hinesdavidjohn · 100% · 398 feedback
    £41.64 incl. £2.46 postage 5.0p/piece 49% above typical
  104. LEGO Technic 42123 McLaren Senna GTR Building Kit Sealed Box
    UK New & sealed 📦 Box 📘 Instructions
    januvaid · 100% · 1,007 feedback
    £42.16 incl. £2.46 postage 5.1p/piece 17% below typical
  105. LEGO TECHNIC: McLaren Senna GTR (42123)
    UK New & sealed 📦 Box 📘 Instructions
    mattmg1969 · 100% · 1,717 feedback
    £42.33 incl. £2.46 postage 5.1p/piece 17% below typical
  106. LEGO Technic 42123 McLaren Senna GTR Building Kit
    UK New & sealed 📦 Box 📘 Instructions ⏱ 5d 19h · 0 bids
    hacaun · 100% · 1,028 feedback
    £42.55 incl. £3.38 postage 5.1p/piece Current bid
  107. LEGO Technic 42123 McLaren Senna GTR Car UNOPENED
    UK New & sealed 📦 Box 📘 Instructions
    faridshavaksha · 100% · 100 feedback
    £42.66 incl. £2.26 postage 5.1p/piece 16% below typical
  108. LEGO TECHNIC McLaren Senna GTR 42123 NEW & sealed
    UK New & sealed 📦 Box 📘 Instructions ⏱ 1d 12h · 0 bids
    sarnyman · 100% · 320 feedback
    £42.86 incl. £5.21 postage 5.2p/piece Current bid
  109. LEGO McLaren Senna GTR Technic 42123 Set New Sealed
    UK New & sealed 📦 Box 📘 Instructions
    2011finch2011 · 100% · 129 feedback
    £43.61 incl. £2.26 postage 5.3p/piece 14% below typical
  110. Technic McLaren 42123
    UK Used · not stated
    she_604462 · 100% · 2 feedback · ⚠ check carefully
    £44.55 incl. £2.26 postage 5.4p/piece 86% above typical
  111. LEGO 42123 - Technic McLaren Senna GTR (Damaged Box)
    UK New & sealed 📦 Box 📘 Instructions
    lmnd20 · 100% · 601 feedback
    £44.55 incl. £2.26 postage 5.4p/piece 12% below typical
  112. LEGO Technic McLaren Senna GTR 42123 Complete NEW
    UK New & sealed 📦 Box 📘 Instructions
    fox41wdrbz · 100% · 679 feedback
    £44.56 incl. £2.26 postage 5.4p/piece 12% below typical
  113. LEGO Technic 42123 McLaren Senna GTR 830 Pieces Complete Set - Unopened
    UK New & sealed 📦 Box 📘 Instructions
    mintbuys93 · 100% · 61 feedback
    £44.76 incl. £2.46 postage 5.4p/piece 12% below typical
  114. Lego 42123 Technic McLaren Senna GTR
    UK Used · not stated
    amhall4 · 100% · 253 feedback
    £44.92 incl. £2.62 postage 5.4p/piece 87% above typical
  115. LEGO TECHNIC: McLaren Senna GTR (42123)
    UK New & sealed 📦 Box 📘 Instructions
    vicki_b100 · 100% · 585 feedback
    £45.72 incl. £3.42 postage 5.5p/piece 10% below typical
  116. LEGO Technic 42123 McLaren Senna GTR – NEW & SEALED – Boxed
    UK New & sealed 📦 Box 📘 Instructions
    bofthes · 100% · 17 feedback
    £45.72 incl. £3.42 postage 5.5p/piece 10% below typical
  117. LEGO 42123 Technic McLaren Senna GTR – Brand New Sealed
    UK New & sealed 📦 Box 📘 Instructions
    007kevbond · 99.2% · 2,964 feedback
    £46.46 free postage 5.6p/piece 9% below typical
  118. LEGO TECHNIC McLaren Senna GTR 42123 Box opened but bags sealed
    UK New & sealed 📦 Box 📘 Instructions ⏱ 4d 19h · 0 bids
    fatboyjai · 100% · 1,231 feedback
    £47.40 incl. £5.15 postage 5.7p/piece Current bid
  119. LEGO TECHNIC: McLaren Senna GTR (42123)
    UK New & sealed 📦 Box 📘 Instructions
    leadhead35 · 100% · 1,272 feedback
    £47.50 free postage 5.7p/piece 7% below typical
  120. LEGO Technic 42123 McLaren Senna GTR - BRAND NEW & SEALED (Retired)
    UK New & sealed 📦 Box 📘 Instructions
    mstores2 · 100% · 142 feedback
    £48.33 incl. £3.38 postage 5.8p/piece 5% below typical
  121. LEGO TECHNIC: McLaren Senna GTR (42123)
    UK New & sealed 📦 Box 📘 Instructions
    silver_at_heart · 100% · 444 feedback
    £49.12 incl. £3.71 postage 5.9p/piece About typical
  122. LEGO TECHNIC McLaren Senna GTR 42123 NEW & SEALED
    UK New & sealed 📦 Box 📘 Instructions
    brererabbit13 · 100% · 819 feedback
    £49.48 incl. £4.06 postage 6.0p/piece About typical
  123. lego Technic Mclaren Senna GTR 42123 * Sealed, BNIB *
    UK New & sealed 📦 Box 📘 Instructions ⏱ 16h 28m · 0 bids
    ron_corleone · 100% · 1,576 feedback
    £50.88 incl. £3.38 postage 6.1p/piece Current bid
  124. LEGO 42123 Technic McLaren Senna GTR | New & Sealed | Retired
    UK New & sealed 📦 Box 📘 Instructions
    ajtsneakers · 95.7% · 534 feedback · ⚠ check carefully
    £50.88 incl. £3.38 postage 6.1p/piece About typical
  125. LEGO TECHNIC: McLaren Senna GTR (42123) NEVER USED Lego 10+ age 2021
    UK New & sealed 📦 Box 📘 Instructions
    highest_bidder10 · 100% · 29 feedback
    £50.88 incl. £3.38 postage 6.1p/piece About typical
  126. LEGO Technic 42123 McLaren Senna GTR Complete Set 830 pcs 10+ brand new unopened
    UK New & sealed 📦 Box 📘 Instructions
    b8xms52 · new seller, no feedback yet · ⚠ check carefully
    £50.88 incl. £3.38 postage 6.1p/piece About typical
  127. LEGO Technic McLaren Senna GTR (42123) - New & Sealed ✅️
    UK New & sealed 📦 Box 📘 Instructions
    gibbsnunes1 · 99.5% · 241 feedback
    £51.36 incl. £3.38 postage 6.2p/piece About typical
  128. LEGO Technic McLaren Senna GTR 42123 Boxed Set Complete BNIB
    UK New & sealed 📦 Box 📘 Instructions
    mxrace450 · 100% · 583 feedback
    £52.52 incl. £2.94 postage 6.3p/piece About typical
  129. Lego technic 42123. McLaren Senna GTR. Brand new
    UK New & sealed 📦 Box 📘 Instructions
    hwin1431 · 100% · 83 feedback
    £52.65 incl. £5.15 postage 6.3p/piece About typical
  130. LEGO TECHNIC: McLaren Senna GTR (42123)
    UK New & sealed 📦 Box 📘 Instructions
    graceandgran · 99.3% · 2,244 feedback
    £52.65 incl. £5.15 postage 6.3p/piece About typical
  131. Lego Technic – 42123 McLaren Senna GTR– New Sealed in Box – 2021
    UK New & sealed 📦 Box 📘 Instructions
    flash-hart · 100% · 8,933 feedback
    £53.37 incl. £3.38 postage 6.4p/piece 5% above typical
  132. LEGO TECHNIC 42123 - McLaren Senna GTR | New & Sealed
    UK New & sealed 📦 Box 📘 Instructions
    instant_replay · 100% · 172 feedback
    £54.14 incl. £5.15 postage 6.5p/piece 6% above typical
  133. LEGO Technic 42123 - McLaren Senna GTR Race Car - Sealed Box New
    UK New & sealed 📦 Box 📘 Instructions
    wantstri_71 · 100% · 19 feedback
    £55.83 incl. £5.21 postage 6.7p/piece 10% above typical
  134. LEGO 42123 TECHNIC: McLaren Senna GTR (New & Sealed)
    UK New & sealed 📦 Box 📘 Instructions
    lovelego123 · 100% · 237 feedback
    £56.08 incl. £3.38 postage 6.8p/piece 10% above typical
  135. LEGO 42123 Technic McLaren Senna GTR Collectible
    UK New & sealed 📦 Box 📘 Instructions
    carl2712 · 100% · 694 feedback
    £56.08 incl. £3.38 postage 6.8p/piece 10% above typical
  136. Unbuilt Lego Technic McLaren Senna GTR 42123 Race Supercar set birthday gift 10+
    UK New & sealed 📦 Box 📘 Instructions
    staceycakeface · 100% · 1,111 feedback
    £56.71 incl. £4.06 postage 6.8p/piece 11% above typical
  137. Lego Technic 42123 - McLaren Senna GTR - BRAND NEW/FACTORY SEALED
    UK New & sealed 📦 Box 📘 Instructions
    vandalberg · 100% · 939 feedback
    £57.89 free postage 7.0p/piece 14% above typical
  138. LEGO Technic Search and Rescue Helicopter 42123
    UK Used · not stated
    9009shane · 100% · 1,097 feedback
    £57.91 incl. £5.21 postage 7.0p/piece 142% above typical
  139. LEGO 42123 - TECHNIC - McLAREN SENNA GTR - BRAND NEW / SEALED
    UK New & sealed 📦 Box 📘 Instructions
    wallymum · 100% · 1,170 feedback
    £57.91 incl. £5.21 postage 7.0p/piece 14% above typical
  140. LEGO Technic 42123 McLaren Senna GTR, New in Bruised Box as Shown in Photos
    UK New & sealed 📦 Box 📘 Instructions ⏱ 1d 11h · 0 bids
    ismoore1001 · 100% · 198 feedback
    £57.91 incl. £5.21 postage 7.0p/piece Current bid
  141. LEGO Technic 42123 McLaren Senna GTR 830-Piece Set 10+ (2021)
    UK New & sealed 📦 Box 📘 Instructions
    mmarkjl · 100% · 73 feedback
    £58.75 incl. £2.94 postage 7.1p/piece 15% above typical
  142. LEGO 42123 Technic McLaren Senna GTR – Brand New Sealed
    UK New & sealed 📦 Box 📘 Instructions
    finderskeepers_1221 · 99.6% · 274 feedback
    £59.35 incl. £6.65 postage 7.2p/piece 17% above typical
  143. McLaren Senna Lego Technic (42123) Complete Set Unopened boxed. Retired Set.
    UK New & sealed 📦 Box 📘 Instructions
    ljc_5398 · 100% · 15 feedback
    £61.61 incl. £3.71 postage 7.4p/piece 21% above typical
  144. LEGO Technic McLaren Senna GTR 42123 Boxed & Unopened-New-Retired set.
    UK New & sealed 📦 Box 📘 Instructions
    logicalname · 100% · 116 feedback
    £62.00 free postage 7.5p/piece 22% above typical
  145. LEGO TECHNIC: McLaren Senna GTR (42123)
    UK New & sealed 📦 Box 📘 Instructions
    chyue0 · 98.4% · 471 feedback
    £62.94 incl. £2.94 postage 7.6p/piece 24% above typical
  146. LEGO McLaren Senna GTR 42123 RETIRED SET. New Sealed Box.
    UK New & sealed 📦 Box 📘 Instructions
    8431wayne · 100% · 629 feedback
    £63.95 incl. £2.94 postage 7.7p/piece 26% above typical
  147. Lego Technic 42123 McLaren Senna GTR Supercar Building Set New Kids Toy Kit 10+
    UK New & sealed 📦 Box 📘 Instructions
    afh.2008 · 98.1% · 1,323 feedback
    £68.29 free postage 8.2p/piece 34% above typical
  148. LEGO Technic 42123 McLaren Senna GTR - Box Opened but all parts bags unopened
    UK New & sealed 📦 Box 📘 Instructions
    emeles · 100% · 224 feedback
    £71.68 incl. £3.38 postage 8.6p/piece 41% above typical
  149. LEGO 42123 Technic McLaren Senna GTR Collectiblebrwnd New And Sealed
    UK New & sealed 📦 Box 📘 Instructions
    nic_2025 · 100% · 75 feedback
    £71.68 incl. £3.38 postage 8.6p/piece 41% above typical
  150. Lego 42123 Technic McLaren Senna GTR BNIB
    UK New & sealed 📦 Box 📘 Instructions
    bmminiparts · 99.8% · 18,971 feedback
    £78.75 free postage 9.5p/piece 55% above typical

Only seeing UK listings. Compare all 5 countries →

Before you buy 42123

  • “Complete” should mean all 830 pieces. Ask the seller whether they checked against the inventory or just think it's complete.
  • Sealed means factory seals intact. Ask for photos of the seals and box corners; box condition moves the price a lot on retired sets.
  • Check the seller's feedback. For a retired set, stick to sellers with 98%+ feedback and a history of selling LEGO.
  • Watch out for knock-offs. Brands like Lepin and Mould King copy popular sets. Look for the LEGO logo on the box and bricks.
  • Pay through eBay. eBay's Money Back Guarantee covers items that don't match the description, but only if you pay through eBay.

Questions

How much is LEGO 42123 McLaren Senna GTR worth?

Based on current eBay UK Buy It Now listings, a new sealed set typically costs £50.88 and a complete used set about £27.92, including postage. These are asking prices, so a set can sell for less.

How many pieces are in LEGO 42123?

McLaren Senna GTR has 830 pieces. It was released in 2021.

What is the price per piece of 42123?

At the typical sealed price of £50.88 it works out at 6.1p per piece.

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