PriceCharting market prices as of :
| Condition / grade | Price (USD) |
|---|---|
| Ungraded | $1.59 |
| PSA 9 | $10.81 |
| PSA 10 | $15 |
| BGS 10 | $20 |
| CGC 10 | $10 |
| SGC 10 | $9 |
Market context: ungraded price +16.1% over 30 days. +24.2% over 90 days. PSA 10 premium: 9.4× ungraded.
Live charts, history, and collection tools: https://tcginsider.net/sets/pokemon-japanese-terastal-festival/pokemon-japanese-terastal-festival-cornerstone-mask-ogerpon-ex-91