PriceCharting market prices as of :
| Condition / grade | Price (USD) |
|---|---|
| Ungraded | $0.5 |
| PSA 7 | $11.5 |
| PSA 8 | $13.73 |
| PSA 9 | $44.99 |
| PSA 10 | $102.5 |
| BGS 10 | $133 |
| CGC 10 | $49.24 |
| SGC 10 | $19.75 |
TCGplayer market price: $0.45 (as of 2026-08-29)
Market context: ungraded price -47.4% over 30 days. -54.5% over 90 days. PSA 10 premium: 205.0× ungraded.
Live charts, history, and collection tools: https://tcginsider.net/sets/pokemon-base-set/pokemon-base-set-grass-energy-99