PriceCharting market prices as of :
| Condition / grade | Price (USD) |
|---|---|
| Ungraded | $6.99 |
| PSA 7 | $4.25 |
| PSA 8 | $4.25 |
| PSA 9 | $19 |
| PSA 10 | $59.99 |
| BGS 10 | $78 |
| CGC 10 | $36 |
| SGC 10 | $36 |
Live charts, history, and collection tools: https://tcginsider.net/sets/pokemon-japanese-promo/pokemon-japanese-promo-koko-s-p-106