PriceCharting market prices as of :
| Condition / grade | Price (USD) |
|---|---|
| Ungraded | $0.2 |
| PSA 9 | $10.28 |
| PSA 10 | $30.92 |
| BGS 10 | $40 |
| CGC 10 | $19 |
| SGC 10 | $19 |
Live charts, history, and collection tools: https://tcginsider.net/sets/pokemon-mega-evolution/pokemon-mega-evolution-mega-signal-121