PriceCharting market prices as of :
| Condition / grade | Price (USD) |
|---|---|
| Ungraded | $435.76 |
| PSA 7 | $2314.87 |
| PSA 8 | $3099.99 |
| PSA 9 | $6200 |
| PSA 10 | $43823.53 |
| BGS 10 | $56971 |
| CGC 10 | $8163.14 |
| SGC 10 | $26294 |
Live charts, history, and collection tools: https://tcginsider.net/sets/pokemon-base-set/pokemon-base-set-mewtwo-1st-edition-10