
LEGO Mystery Castle is retired and trades +107% versus its original retail price. Retired sets usually keep climbing as sealed supply dries up, so most collectors hold and sell into a spike rather than flipping now.
Track Mystery Castle and get a sell alertThe LEGO Mystery Castle (set 70437) is a Hidden Side set released in 2020 with ? pieces. It has retired and is no longer produced by LEGO, which is often when collectible sets start to gain value.
It originally sold for $100. Today, sealed copies trade around $207 on the secondary market, a gain of 107% versus its original price. Used copies average $162, with listings ranging from $158 to $343.
Prices for the LEGO Mystery Castle come from live BrickLink marketplace data, updated regularly. To see its full price history, retirement forecast and the best window to sell, track it in your free BrickGains portfolio.