PriceCharting market prices as of :
| Condition / grade | Price (USD) |
|---|---|
| Ungraded | $5 |
| PSA 9 | $5.5 |
| PSA 10 | $28.37 |
| BGS 10 | $37 |
| CGC 10 | $17 |
| SGC 10 | $17 |
Live charts, history, and collection tools: https://tcginsider.net/sets/pokemon-japanese-terastal-festival/pokemon-japanese-terastal-festival-seaking-master-ball-29