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PSA 10: Median of 2 sales, last 45 days · newest Sep 28, 2026 · checked Oct 26, 2026
PSA 9: Median of 4 PSA 9 sales in the last 90 days, latest 2026-10-23. Grade 9 guide (all graders): $46.
Grade 7 and Grade 8 are PriceCharting guides across all graders (PSA, CGC, BGS, SGC, TAG).
GemDelta shows Grass Energy (Base Set #99) at $26.80 market price (TCGplayer market). Its Delta multiple is 10.4x.
A PSA 10 Grass Energy (Base Set #99) is currently shown at $280, the median of 2 PSA 10 sales in the last 45 days (newest Sep 28, 2026).
GemDelta records a 25.9% gem rate for Grass Energy (Base Set #99), with 542 PSA 10 copies out of 2,096 total PSA grades and a 10.4x Delta. That describes the grading profile; it is not financial advice.
| Date | Listing | Sale |
|---|---|---|
| Sep 28, 2026 | 1999 POKEMON BASE SET 1ST EDITION #99 GRASS ENERGY PSA 10 GEM MINT #99 | $380.00 |
| Sep 17, 2026 | Pokemon Grass Energy #99 1st Edition Base Set PSA Trading Card Game Gem Mint 10 (Wizards of the Coast, 1999).... [Herita | $179.00 |
| Sep 7, 2026 | PSA 10 GEM MINT Grass Energy 99/102 Base Set 1st Edition Pokemon Card CS1-395 | $247.50 |
| Aug 31, 2026 | 1999 POKEMON BASE SET 1ST EDITION #99 GRASS ENERGY PSA 10 #99 | $255.00 |
| Aug 31, 2026 | 1999 POKEMON BASE SET 1ST EDITION #99 GRASS ENERGY PSA 10 #99 | $265.00 |
| Aug 4, 2026 | 1999 Pokemon Base Set 1st Edition Grass Energy PSA 10 Gem Mint #99 WOTC | $175.02 |
| Jun 2, 2026 | Pokemon 1999 Base Set 1st Edition Grass Energy #99 💎 PSA 10 Gem Mint 💎 099/102 | $317.00 |