PriceCharting market prices as of :
| Condition / grade | Price (USD) |
|---|---|
| Ungraded | $85.51 |
| PSA 9 | $72.49 |
| PSA 10 | $4050 |
| BGS 10 | $5265 |
| CGC 10 | $2430 |
| SGC 10 | $2430 |
Live charts, history, and collection tools: https://tcginsider.net/sets/pokemon-brilliant-stars/pokemon-brilliant-stars-mewtwo-cosmos-holo-56