Set 10366
Tropical Aquarium
On shelves nowRetail price$479.99What LEGO charged
Worth now$679.78Typical sealed asking price · 19 listings
Recently sold—No recent sales on file
vs retail+42%Worth more than it cost
Worth watching
Retail is $480; you'd want it nearer $418. Wait for a sale.
How much is LEGO 10366 Tropical Aquarium worth?
LEGO 10366 Tropical Aquarium is worth about $679.78 sealed right now, based on 19 live sealed listings on eBay. That's 42% above its $479.99 retail price. It came out in 2025 with 4,154 pieces. It's still sold in shops. Over the last 85 days its typical asking price has risen 6%, from $639.88 to $679.78. We last checked it 5 days ago.
Price history
Value history
Oct 20$68019 listings
- Lowest
- $569
- Highest
- $691
- Change
- +6%
- Asking vs retail
- +42%
27 observations · median asking · rechecked 8× daily
Should you buy it?
Still on shelves at $480 and already worth $680 sealed. That’s the one to watch.
If you bought it to resell
Sells sealed for$680
Marketplace fees · 15.25%−$104
Payment processing · 2.9% + $0.30−$21
Shipping · est. from 4,154 pieces−$34
Reaches you$521
Pay no more than$401
For a 30% return at your costs. Change them and every figure on the site follows.
How long has it been on shelves?
Still early — released 2025, and sets like this usually run about 4 years. No hurry.
LEGO never announces retirement dates. This is only how long the set has been available against how long sets of its size usually run — not a prediction, and not inside information.
Set details
- Set number
- 10366
- Theme
- Icons
- Released
- 2025
- Status
- On shelves now
- Pieces
- 4,154
- Minifigures
- —
- Retail price
- $479.99
- Value per piece
- $0.164
- Price confidence
- high · 19 listings
- Last checked
- 5 days ago
Where these numbers come from
eBay19 live listingsThe asking price here — the median of what sellers want right now, $680. Last checked Oct 20.See the listings →BrickLinkPrice guideNo completed sales recorded for this one yet. Last checked Oct 24.Open the price guide →Catalogue4,154 piecesPiece counts, minifigures, release year and retail price come from Rebrickable and Brickset. Retail was $480.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.
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