PriceCharting market prices as of :
| Condition / grade | Price (USD) |
|---|---|
| Ungraded | $2.95 |
| PSA 8 | $33.44 |
| PSA 9 | $37 |
| PSA 10 | $80.65 |
| BGS 10 | $105 |
| CGC 10 | $14.5 |
| SGC 10 | $48 |
Live charts, history, and collection tools: https://tcginsider.net/sets/pokemon-base-set/pokemon-base-set-poliwag-1999-2000-59