Set 11204
Mermaid Gabby's Aquarium Adventure
Retired Aug 2026Retail price$22.99What LEGO charged
Worth now$27.70Typical sealed asking price · 14 listings
Recently sold$26.70Only 1 sale so far — too few to lean on
vs retail+20%Worth more than it cost
Holding value
20% above its $23 retail price. Steady rather than spectacular.
How much is LEGO 11204 Mermaid Gabby's Aquarium Adventure worth?
LEGO 11204 Mermaid Gabby's Aquarium Adventure is worth about $27.70 sealed right now, based on 14 live sealed listings on eBay. That's 20% above its $22.99 retail price. It came out in 2025 with 114 pieces and 3 minifigures. It was retired in Aug 2026. Over the last 88 days its typical asking price has fallen 8%, from $29.99 to $27.70. We last checked it yesterday.
Price history
Value history
Oct 26$2814 listings
- Lowest
- $25
- Highest
- $33
- Change
- -8%
- Asking vs retail
- +20%
27 observations · median asking · rechecked 8× daily
Should you buy it?
If you bought it to resell
Sells sealed for$28
Marketplace fees · 15.25%−$4
Payment processing · 2.9% + $0.30−$1
Shipping · est. from 114 pieces−$9
Reaches you$13
Pay no more than$10
For a 30% return at your costs. Change them and every figure on the site follows.
What it actually sold for
Sealed
$27
1 sold in six monthsSellers are asking 4% more than buyers actually paid. The $28 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
- 11204
- Theme
- Gabby's Dollhouse
- Released
- 2025
- Status
- Retired Aug 2026
- Pieces
- 114
- Minifigures
- 3
- Retail price
- $22.99
- Value per piece
- $0.243
- Price confidence
- high · 14 listings
- Last checked
- yesterday
Where these numbers come from
eBay14 live listingsThe asking price here — the median of what sellers want right now, $28. Last checked Oct 26.See the listings →BrickLink1 completed salesWhat it actually sold for — $27 across six months of real transactions. Last checked Oct 24.Open the price guide →Catalogue114 piecesPiece counts, minifigures, release year and retail price come from Rebrickable and Brickset. Retail was $23.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 Gabby's Dollhouse sets from around 2025
See all →
▲ 9% vs retailRetired11205 · 2025Sweet Treat Mountain & Kitty GardenGabby's Dollhouse · 263 pcs$6019 listings · retail $55Flat since retirement
▲ 60% vs retail11212 · 2026Kitty Fairy's Garden HouseGabby's Dollhouse · 103 pcs$244 listings · retail $15Not enough data
▲ 74% vs retail11214 · 2026Fairy Roller Coaster and Tea PartyGabby's Dollhouse · 137 pcs$613 listings · retail $35Not enough data
▼ 3% vs retail11215 · 2026Gabby's Brick-Built Cat FriendsGabby's Dollhouse · 324 pcs$438 listings · retail $45Not at retail