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PSA 10: PriceCharting; refreshed Sep 10, 2026
GemDelta shows Brock's Geodude (Gym Heroes #38) at $4.78 market price (TCGplayer market). Its Delta multiple is 19.9x.
A PSA 10 Brock's Geodude (Gym Heroes #38) is currently shown at $98.59. GemDelta labels this as an unverified PriceCharting guide fallback rather than verified recent sales.
GemDelta records a 17.5% gem rate for Brock's Geodude (Gym Heroes #38), with 41 PSA 10 copies out of 234 total PSA grades and a 19.9x Delta. That describes the grading profile; it is not financial advice.