PriceCharting market prices as of :
| Condition / grade | Price (USD) |
|---|---|
| Ungraded | $4.72 |
| PSA 9 | $17.05 |
| PSA 10 | $50.26 |
| BGS 10 | $65 |
| CGC 10 | $30 |
| SGC 10 | $30 |
Live charts, history, and collection tools: https://tcginsider.net/sets/pokemon-chinese-151-collect/pokemon-chinese-151-collect-koffing-109