3818Bikini Bottom Undersea Party
- 2012released
- 471pieces
- 4minifigures
- SpongeBob SquarePantstheme
Typical new & sealed
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from – · too few listings
Typical used & complete
–
from £125 · too few listings
View on eBay →
Updated 8h ago · 3 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.
3 listings
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LEGO 3818 Bikini Bottom Undersea Party SpongeBob Squarepants Set Rare Retired UK
Used · not stated
mr_vz · 100% · 303 feedback£71.24 incl. £2.94 postage 15.1p/piece Not enough data -
LEGO SpongeBob Squarepants 3818 Bikini Bottom Undersea Party 100% Complete UK
Used · complete
finbrown0 · 100% · 141 feedback£125 incl. £4.52 postage 26.4p/piece Not enough data -
Lego SpongeBob SquarePants: Bikini Bottom Undersea Party 3818 Read Description UK
Used · not stated
scrabble218 · 100% · 239 feedback£146 incl. £4.90 postage 31.0p/piece Not enough data
Only seeing UK listings. Compare all 5 countries →
Before you buy 3818
- Check all 4 minifigures are included. Minifigures are the first thing sold off from used sets, and often the most valuable part.
- “Complete” should mean all 471 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 3818 Bikini Bottom Undersea Party worth?
There are too few listings right now to give a reliable typical price. Choose "All countries" to see listings from 5 eBay sites.
How many pieces are in LEGO 3818?
Bikini Bottom Undersea Party has 471 pieces and 4 minifigures. It was released in 2012.
