PriceCharting market prices as of :
| Condition / grade | Price (USD) |
|---|---|
| PSA 10 | $1025 |
| BGS 10 | $1333 |
| CGC 10 | $615 |
| SGC 10 | $615 |
Live charts, history, and collection tools: https://tcginsider.net/sets/pokemon-japanese-e-card-sample/pokemon-japanese-e-card-sample-koffing-4