Base/#51/102Gembook Valuei·PSA 7As of Jun 14, 2026 · updated daily at 6:00 AM PT
Confidence Limited · weighted median of 3 verified sales
Fair range $21 – $30
Confidence Limited · weighted median of 3 verified sales
Fair range $21 – $30
Koffing
$25#11398 Overall#1497 in Base▲ 6.5%SET · 30D
1ST EDITION · PSA 7G
Price History▼ 44.2%
Details
SetBase
Number51 / 102
Released1999
PSA population233
Price confidenceLimited
Fair range$21 – $30
Last sale$13 · Jun 3, 2026
Live listings0 · checked daily
Recent sales
3 verified · 15 shownJun 3, 2026eBay$13—
Jun 3, 2026eBay$21—
May 30, 2026eBay$70—
Apr 26, 2026eBay$38—
Apr 7, 2026eBay$38—
Live listings
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How we price this
Gembook Value is the weighted median of 3 verified eBay sales. Shill bids, unpaid items, and outliers are filtered out — the numbers you see actually cleared.