PriceCharting market prices as of :
| Condition / grade | Price (USD) |
|---|---|
| Ungraded | $31.66 |
| PSA 7 | $136.19 |
| PSA 8 | $1500 |
| PSA 9 | $1650 |
| PSA 10 | $20000 |
| BGS 10 | $26000 |
| CGC 10 | $12000 |
| SGC 10 | $12000 |
Live charts, history, and collection tools: https://tcginsider.net/sets/pokemon-japanese-promo/pokemon-japanese-promo-mewtwo-corocoro-glossy-150