Set 21174
The Modern Treehouse
Retired Jan 2023Retail price$119.99What LEGO charged
Worth now$139.95Typical sealed asking price · 31 listings
Recently sold$108.00Only 1 sale so far — too few to lean on
vs retail+17%Worth more than it cost
Holding value
17% above its $120 retail price. Steady rather than spectacular.
How much is LEGO 21174 The Modern Treehouse worth?
LEGO 21174 The Modern Treehouse is worth about $139.95 sealed right now, based on 31 live sealed listings on eBay. That's 17% above its $119.99 retail price. It came out in 2021 with 909 pieces and 4 minifigures. It was retired in Jan 2023. Over the last 82 days its typical asking price has fallen 4%, from $145.83 to $139.95. We last checked it 9 days ago.
Price history
Value history
Oct 18$14031 listings
- Lowest
- $134
- Highest
- $150
- Change
- -4%
- Asking vs retail
- +17%
26 observations · median asking · rechecked 8× daily
Should you buy it?
31 listings behind this — one of the better-evidenced values on the site.
If you bought it to resell
Sells sealed for$140
Marketplace fees · 15.25%−$21
Payment processing · 2.9% + $0.30−$5
Shipping · est. from 909 pieces−$18
Reaches you$96
Pay no more than$74
For a 30% return at your costs. Change them and every figure on the site follows.
What it actually sold for
Sealed
$108
1 sold in six monthsUsed
$80
1 sold in six monthsSellers are asking 30% more than buyers actually paid. The $140 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.
Worth more in pieces?
Parted out$130vsSealed$140
Roughly the same either way. Sealed is less work.
- Minifigures
- $28
- Loose parts
- 923 pieces
Minifigure prices are real completed BrickLink sales. The parts figure is an estimate — the set’s own inventory at the catalogue average, not each piece priced individually. Treat it as a guide, and remember parting out is hours of work and many small sales.
Set details
- Set number
- 21174
- Theme
- Minecraft
- Released
- 2021
- Status
- Retired Jan 2023
- Pieces
- 909
- Minifigures
- 4
- Retail price
- $119.99
- Value per piece
- $0.154
- Price confidence
- high · 31 listings
- Last checked
- 9 days ago
Where these numbers come from
eBay31 live listingsThe asking price here — the median of what sellers want right now, $140. Last checked Oct 18.See the listings →BrickLink1 completed salesWhat it actually sold for — $108 across six months of real transactions. Last checked Oct 24.Open the price guide →Catalogue909 piecesPiece counts, minifigures, release year and retail price come from Rebrickable and Brickset. Retail was $120.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 2021
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