Snapshot
- vs RRP
- +105% over
- Per piece
- 20¢
Value per piece
cost per part at each reference
20¢lowest market value
Reference
MSRP9.7¢
Used market20¢
New market20¢
Where to buy new
- Amazonout of stock$259.99
New at retail · MSRP $99.99 · via BrickPicker
Set Retired
Mystery Castle
- Reference
- 70437-1
- Theme
- Hidden Side
- Year
- 2020
- Parts
- 1,035
Mystery Castle is a LEGO set from the LEGO Hidden Side theme released in 2020. The set contains 1,035 parts.
New avg$205.00Used avg$205.00MSRP$99.99
Avg. 3rd-party market prices via BrickPicker, not CollectORbuild seller prices
Value historytracking since Jul 28, 2026
Currently $205.00 new. We just started tracking this set’s value. The chart fills in as prices are re-checked over the coming weeks.
