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PSA 10: PriceCharting; refreshed Sep 10, 2026
GemDelta shows Koga's Koffing (Gym Challenge #79) at $1.88 market price (PriceCharting raw (eBay sold fallback)). Its Delta multiple is 30.5x.
A PSA 10 Koga's Koffing (Gym Challenge #79) is currently shown at $57.25. GemDelta labels this as an unverified PriceCharting guide fallback rather than verified recent sales.
GemDelta records a 29.2% gem rate for Koga's Koffing (Gym Challenge #79), with 21 PSA 10 copies out of 72 total PSA grades and a 30.5x Delta. That describes the grading profile; it is not financial advice.