Set 70437
Mystery Castle
Retired Nov 2020Retail price$99.99What LEGO charged
Worth now$249.47Typical sealed asking price · 16 listings
Recently sold—No recent sales on file
vs retail+149%Worth more than it cost
Proven performer
Up 149% on its $100 retail price since retiring. Pay under $147 to still make a margin reselling.
How much is LEGO 70437 Mystery Castle worth?
LEGO 70437 Mystery Castle is worth about $249.47 sealed right now, based on 16 live sealed listings on eBay. That's 149% above its $99.99 retail price. It came out in 2020 with 1,035 pieces and 6 minifigures. It was retired in Nov 2020. Over the last 82 days its typical asking price has risen 4%, from $239.99 to $249.47. We last checked it 8 days ago.
Price history
Value history
Oct 19$24916 listings
- Lowest
- $230
- Highest
- $250
- Change
- +4%
- Asking vs retail
- +149%
26 observations · median asking · rechecked 8× daily
Should you buy it?
Up 149% on retail since retiring. A proper hold.
If you bought it to resell
Sells sealed for$249
Marketplace fees · 15.25%−$38
Payment processing · 2.9% + $0.30−$8
Shipping · est. from 1,035 pieces−$18
Reaches you$185
Pay no more than$143
For a 30% return at your costs. Change them and every figure on the site follows.
Set details
- Set number
- 70437
- Theme
- Hidden Side
- Released
- 2020
- Status
- Retired Nov 2020
- Pieces
- 1,035
- Minifigures
- 6
- Retail price
- $99.99
- Value per piece
- $0.241
- Price confidence
- high · 16 listings
- Last checked
- 8 days ago
Where these numbers come from
eBay16 live listingsThe asking price here — the median of what sellers want right now, $249. Last checked Oct 19.See the listings →BrickLinkPrice guideNo completed sales recorded for this one yet. Last checked Oct 23.Open the price guide →Catalogue1,035 piecesPiece counts, minifigures, release year and retail price come from Rebrickable and Brickset. Retail was $100.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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