PriceCharting market prices as of :
| Condition / grade | Price (USD) |
|---|---|
| Ungraded | $0.75 |
| PSA 9 | $8.5 |
| PSA 10 | $18.5 |
| BGS 10 | $24 |
| CGC 10 | $11 |
| SGC 10 | $11 |
Live charts, history, and collection tools: https://tcginsider.net/sets/pokemon-steam-siege/pokemon-steam-siege-hoopa-51