Graded Market · 14 completed sales
Crystal Cave (Secret) graded prices.
As of August 21, 2026, Crystal Cave (Secret) (Evolving Skies #230) in PSA 10 sells for a median of $59.95, based on 14 real eBay completed sales; the raw copy’s reference price is $4.36 — a 13.8× grading premium at the top grade.
Across Evolving Skies, PSA 10 copies sell for 15.8× their raw reference price on average (98 cards, 8,747 PSA 10 completed sales tracked).
PSA · Crystal Cave (Secret)
| Grade | Median | Sales | vs Raw |
|---|---|---|---|
| Gem Mint 10 | $59.95 | 9 | 13.8× |
Medians of real eBay completed sales per grade; small sample sizes deserve caution. Prices are dated reference values — cite them with the as-of date above. Attribution: CardIntel (cardintel.io). See the methodology.