About Mystery Castle

LEGO 70437 Mystery Castle is part of the LEGO Hidden Side theme, contains 1,035 pieces, includes 6 minifigures. Its original US MSRP was $99.99. BrickPicker tracks live retailer pricing across Amazon, Walmart, Target and LEGO.com, eBay sold history, BrickLink part-out value, retirement forecasts and an investment score for Mystery Castle.

Answered live from BrickPicker’s market tracking, review analysis and retirement model — these update as the data does.

What is LEGO 70437 Mystery Castle worth today?

BrickPicker currently values a sealed Mystery Castle at $205.00, based on 6 eBay sales over the last 90 days. That is 105% above its original $99.99 US retail price. The full price history is on this page.

How has LEGO 70437 Mystery Castle performed compared with its retail price?

Since retiring, it has appreciated about 105% over its $99.99 retail price, with sealed copies now trading around $205.00. BrickPicker subscribers get the full Max Profit analysis for this set, which weighs eBay sold trends, retirement timing, liquidity and reviewer sentiment into one verdict.

Is LEGO 70437 Mystery Castle retired?

Yes. Mystery Castle retired in November 2020. Once retired, sets are only available on the aftermarket, which BrickPicker tracks through eBay sold prices and BrickLink listings.

How good is LEGO 70437 Mystery Castle according to reviews?

Mystery Castle holds a BrickScore of 72 (Recommended), the consensus of 4 expert reviews from 4 sources. Owners rate it 4.8/5 across 99 buyer ratings. Read the full review analysis →