PriceCharting market prices as of :
| Condition / grade | Price (USD) |
|---|---|
| Ungraded | $26.99 |
| PSA 7 | $9.99 |
| PSA 8 | $37.46 |
| PSA 9 | $50 |
| PSA 10 | $290.25 |
| BGS 10 | $377 |
| CGC 10 | $178.62 |
| SGC 10 | $174 |
Live charts, history, and collection tools: https://tcginsider.net/sets/pokemon-japanese-promo/pokemon-japanese-promo-diglett-50