Set 21240
The Swamp Adventure
Retired Dec 2024Retail price$9.99What LEGO charged
Worth now$9.79Based on 17 recent sealed sales
Asking now$13.50Typical price on 44 eBay listings
vs retail−2%Worth less than shop price
Too expensive
Selling costs more than this set returns.
How much is LEGO 21240 The Swamp Adventure worth?
LEGO 21240 The Swamp Adventure is worth about $9.79 sealed right now, based on 17 recent sealed sales. That's 2% below its $9.99 retail price. It came out in 2023 with 65 pieces and 2 minifigures. It was retired in Dec 2024. Over the last 82 days its typical asking price has fallen 4%, from $13.99 to $13.50. We last checked it 8 days ago.
Price history
Value history
Oct 18$1444 listings
- Lowest
- $13
- Highest
- $15
- Change
- -4%
- Asking vs retail
- +35%
26 observations · median asking · rechecked 8× daily
Should you buy it?
Sellers want $14, but it’s actually been going for $10. Offer low.
If you bought it to resell
Sells sealed for$10
Marketplace fees · 15.25%−$1
Payment processing · 2.9% + $0.30−$1
Shipping · est. from 65 pieces−$5
Reaches you$3
Pay no more than$2
For a 30% return at your costs. Change them and every figure on the site follows.
What it actually sold for
Sealed
$10
17 sold in six months · $7–$15Used
$6
2 sold in six monthsSellers are asking 38% more than buyers actually paid. The $14 figure above is a ceiling; this is the floor to negotiate toward.
Completed BrickLink transactions over the last six months. Real sales, not asking prices.
Set details
- Set number
- 21240
- Theme
- Minecraft
- Released
- 2023
- Status
- Retired Dec 2024
- Pieces
- 65
- Minifigures
- 2
- Retail price
- $9.99
- Value per piece
- $0.208
- Price confidence
- high · 44 listings
- Last checked
- 8 days ago
Where these numbers come from
eBay44 live listingsThe asking price here — the median of what sellers want right now, $14. Last checked Oct 18.See the listings →BrickLink17 completed salesWhat it actually sold for — $10 across six months of real transactions. Last checked Oct 24.Open the price guide →Catalogue65 piecesPiece counts, minifigures, release year and retail price come from Rebrickable and Brickset. Retail was $10.See the catalogue entry →
eBay links are affiliate links — if you buy after clicking, we earn a small commission at no cost to you, and that is what pays for the site. BrickLink has no such programme, so those are plain links. Neither changes what we show or what we say about it.
How to read this. The value is the median of live sealed listings, after removing instructions, empty boxes, used sets, multi-set lots and implausible outliers. Real sale prices usually land below asking, so the buy-below figure is deliberately the conservative end of the range.
More Minecraft sets from around 2023
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