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PSA 10: Median of 2 sales, last 45 days · newest Oct 15, 2026 · checked Oct 26, 2026
PSA 9: Median of 6 PSA 9 sales in the last 90 days, latest 2026-10-19. Grade 9 guide (all graders): $88.
Grade 7 and Grade 8 are PriceCharting guides across all graders (PSA, CGC, BGS, SGC, TAG).
GemDelta shows Koffing (Base Set #51) at $32.30 market price (TCGplayer market). Its Delta multiple is 25.6x.
A PSA 10 Koffing (Base Set #51) is currently shown at $827, the median of 2 PSA 10 sales in the last 45 days (newest Oct 15, 2026).
GemDelta records a 22.4% gem rate for Koffing (Base Set #51), with 632 PSA 10 copies out of 2,819 total PSA grades and a 25.6x Delta. That describes the grading profile; it is not financial advice.
| Date | Listing | Sale |
|---|---|---|
| Oct 15, 2026 | Pokemon Koffing #51 1st Edition Base Set PSA Trading Card Game Gem Mint 10 (Wizards of the Coast, 1999).... [HeritageAuc | $625.00 |
| Oct 7, 2026 | Pokemon TCG: Koffing 51/102 - Base Set 1st Edition - PSA 10 | $1028.89 |
| Sep 7, 2026 | PSA 10 GEM MINT Koffing 51/102 Base Set 1st Edition Pokemon Card CS1-975 | $543.00 |