PriceCharting market prices as of :
| Condition / grade | Price (USD) |
|---|---|
| Ungraded | $4.47 |
| PSA 8 | $15.5 |
| PSA 9 | $25 |
| PSA 10 | $102.42 |
| BGS 10 | $133 |
| CGC 10 | $61 |
| SGC 10 | $61 |
Live charts, history, and collection tools: https://tcginsider.net/sets/pokemon-japanese-thunder-knuckle/pokemon-japanese-thunder-knuckle-thundurus-ex-20