PriceCharting market prices as of :
| Condition / grade | Price (USD) |
|---|---|
| Ungraded | $11.43 |
| PSA 9 | $29.12 |
| PSA 10 | $49.95 |
| BGS 10 | $65 |
| CGC 10 | $15 |
| SGC 10 | $30 |
Market context: ungraded price -11.1% over 30 days. +3.7% over 90 days. PSA 10 premium: 4.4× ungraded.
Live charts, history, and collection tools: https://tcginsider.net/sets/pokemon-japanese-mask-of-change/pokemon-japanese-mask-of-change-cornerstone-mask-ogerpon-ex-128