PriceCharting market prices as of :
| Condition / grade | Price (USD) |
|---|---|
| Ungraded | $2.57 |
| PSA 8 | $19.99 |
| PSA 9 | $49.48 |
| PSA 10 | $155.5 |
| BGS 10 | $202 |
| CGC 10 | $93 |
| SGC 10 | $93 |
Live charts, history, and collection tools: https://tcginsider.net/sets/pokemon-base-set/pokemon-base-set-onix-1999-2000-56