Sphinx Secret Surprise #5978 — LEGO Adventurers Set Value
LEGO AdventurersWhat the Sphinx Secret Surprise #5978 LEGO set is worth — loose, complete, and sealed.
Sphinx Secret Surprise #5978 value — Loose $17 · Complete (CIB) $157 · Sealed (new) $375. Prices updated July 2026.
Monthly CIB value, based on sold comps.
See the actual sold listings on eBay ↗Live on eBay right now
▍
Price data verified against · 1
Item details
- UPC / EAN
- 0042884059781
- Brand
- LEGO
- Theme
- LEGO Adventurers
- Set number
- #5978
- Release date
- January 1, 1998
Sphinx Secret Surprise #5978 (LEGO Adventurers) resale value
A loose Sphinx Secret Surprise #5978 set runs around $17, a complete copy (all pieces + box + instructions) about $157, and a factory-sealed box commands $375.
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 | $17 | eBay sold comps |
| Complete (CIB) | $157 | eBay sold comps |
| Sealed (new) | $375 | eBay sold comps |
| Live asking — low / typical / high | $10.1 / $139.99 / $599 | 20 live eBay listings ↗ |
Market check: As of July 19, 2026, 20 live eBay listings ask $10.10–$599.00 (median $139.99).
Frequently asked questions
- What is the best value condition for Sphinx Secret Surprise #5978?
- For the best immediate value, the loose set is available for $25, though the sealed version holds the highest resale potential at $505.
- How much is a complete but not sealed version?
- A complete, in-box (CIB) version of Sphinx Secret Surprise #5978 is priced at $157.
- Is this set considered rare within the LEGO Adventurers theme?
- Based on the wide price range from $25 to $505, this item shows strong collector demand within the LEGO Adventurers theme.
