Mystery Castle #70437 — LEGO Hidden Side Set Value
LEGO Hidden SideWhat the Mystery Castle #70437 LEGO set is worth — loose, complete, and sealed.
Mystery Castle #70437 value — Loose $75 · Complete (CIB) $150 · Sealed (new) $226. Prices updated August 2026.
Monthly CIB value, based on sold comps.
See the actual sold listings on eBay ↗Live on eBay right now
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Price data verified against · 1
Item details
- UPC / EAN
- 5702016617580
- Brand
- LEGO
- Theme
- LEGO Hidden Side
- Set number
- #70437
- Release date
- January 1, 2020
Mystery Castle #70437 (LEGO Hidden Side) resale value
A loose Mystery Castle #70437 set runs around $75, a complete copy (all pieces + box + instructions) about $150, and a factory-sealed box commands $226.
What drives the price
Retired sets, completeness (every piece + minifigs + instructions + box), and sealed condition drive LEGO value. Exclusive sets and discontinued themes appreciate the most; minifigs alone can carry significant value.
Price guide
What this actually trades for — sold values by condition vs. what sellers are asking today
| Condition | Value | Based on |
|---|---|---|
| Loose | $75 | eBay sold comps |
| Complete (CIB) | $150 | eBay sold comps |
| Sealed (new) | $226 | eBay sold comps |
| Live asking — low / typical / high | $8 / $223.99 / $575 | 20 live eBay listings ↗ |
Market check: As of July 19, 2026, 20 live eBay listings ask $8.00–$575.00 (median $223.99).
Frequently asked questions
- What is the best deal for Mystery Castle #70437?
- The best value depends on your needs; loose is $74, while complete in the box is $144.
- Is the sealed version worth the extra cost?
- The sealed, new version is listed at $210, offering the highest value for collectors seeking mint condition.
- How much is the loose version of this set?
- The loose version of LEGO Hidden Side Mystery Castle #70437 is currently priced at $74.