LEGO Bikini Bottom Undersea Party 3818-1
LEGO Bikini Bottom Undersea Party (3818-1) is worth about $335 on the secondary market today, against a $70 retail price. It has 471 pieces, belongs to the SpongeBob SquarePants theme and was released in 2011.
- Set number
- 3818-1
- Theme
- SpongeBob SquarePants
- Year
- 2011
- Pieces
- 471
- Minifigures
- 4
- RRP
- $70
- Market value
- $335
- Used value
- $94
- Released
- 2011
- Retirement
- Retired in 2013
Minifigures in LEGO Bikini Bottom Undersea Party
Bikini Bottom Undersea Party value by year
From $57 in 2013 to $317 in 2026 so far: +458%. Its highest year was 2025, at $323.
| Year | Value | Change |
|---|---|---|
| 2026 (so far) | $317 | −1.7% |
| 2025 | $323 | +14.8% |
| 2024 | $281 | −8.6% |
| 2023 | $308 | +11.0% |
| 2022 | $277 | +4.7% |
| 2021 | $265 | +28.7% |
| 2020 | $206 | +28.2% |
| 2019 | $161 | −3.6% |
| 2018 | $167 | +79.0% |
| 2017 | $93 | +13.6% |
| 2016 | $82 | +40.2% |
| 2015 | $58 | +2.7% |
| 2014 | $57 | +0.0% |
| 2013 | $57 | — |
Median of each year's market prices, sealed, in US dollars.
What you are paying for
Its 4 priced minifigures are worth about $46 together, roughly 14% of the set's value — about typical for sets with minifigures (typically 24%).
Frequently asked questions
How much is LEGO Bikini Bottom Undersea Party (3818-1) worth?
LEGO Bikini Bottom Undersea Party is worth approximately $335 on the secondary market today, based on current listings and completed sales. BrickStats updates this value daily.
Is LEGO Bikini Bottom Undersea Party retired?
Yes — Bikini Bottom Undersea Party (3818-1) has been retired by LEGO and is no longer in production. Retired sets have fixed supply, which is why their prices are driven purely by the resale market.
Has LEGO Bikini Bottom Undersea Party gone up in value?
Yes. Bikini Bottom Undersea Party launched at $70 and now trades around $335, an increase of 378.5%. See the price history chart for how it got there.
What is the price per piece for Bikini Bottom Undersea Party?
At its $70 retail price across 471 pieces, Bikini Bottom Undersea Party works out to about $0.149 per piece. Collectors often use price per piece to judge whether a set is good value.
Is LEGO Bikini Bottom Undersea Party a good investment?
Bikini Bottom Undersea Party currently trades 378.5% above its $70 retail price, and it is retired, so no new supply is entering the market. Past performance is not a prediction — condition, packaging and how long you hold all affect what a set actually sells for. BrickStats reports the numbers rather than giving investment advice.
Why is LEGO Bikini Bottom Undersea Party so expensive?
Bikini Bottom Undersea Party was released in 2011 and has since retired. Once LEGO stops producing a set, the only supply is what is already in circulation, so sealed copies in good condition compete for a shrinking pool of stock. That scarcity, not the parts, is what moves the price.