PriceCharting market prices as of :
| Condition / grade | Price (USD) |
|---|---|
| Ungraded | $1.23 |
| PSA 8 | $12.26 |
| PSA 9 | $26.32 |
| PSA 10 | $129.99 |
| BGS 10 | $169 |
| CGC 10 | $39.99 |
| SGC 10 | $78 |
Live charts, history, and collection tools: https://tcginsider.net/sets/pokemon-promo/pokemon-promo-golduck-8