PriceCharting market prices as of :
| Condition / grade | Price (USD) |
|---|---|
| Ungraded | $13.99 |
| PSA 7 | $14 |
| PSA 8 | $17.99 |
| PSA 9 | $42.13 |
| PSA 10 | $285 |
| BGS 10 | $371 |
| CGC 10 | $61 |
| SGC 10 | $171 |
TCGplayer market price: $13.16 (as of 2026-07-05)
Live charts, history, and collection tools: https://tcginsider.net/sets/pokemon-gym-heroes/pokemon-gym-heroes-brock-s-onix-1st-edition-21