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PSA 10: PriceCharting; refreshed Sep 10, 2026
GemDelta shows Koga's Grimer (Gym Challenge #78) at $1.99 market price (PriceCharting raw (eBay sold fallback)). Its Delta multiple is 28.6x.
A PSA 10 Koga's Grimer (Gym Challenge #78) is currently shown at $56.85. GemDelta labels this as an unverified PriceCharting guide fallback rather than verified recent sales.
GemDelta records a 32.8% gem rate for Koga's Grimer (Gym Challenge #78), with 20 PSA 10 copies out of 61 total PSA grades and a 28.6x Delta. That describes the grading profile; it is not financial advice.