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PSA 10: PriceCharting; refreshed Sep 10, 2026
GemDelta shows Brock's Training Method (Gym Heroes #106) at $3.57 market price (TCGplayer market). Its Delta multiple is 24.0x.
A PSA 10 Brock's Training Method (Gym Heroes #106) is currently shown at $86.00. GemDelta labels this as an unverified PriceCharting guide fallback rather than verified recent sales.
GemDelta records a 18.6% gem rate for Brock's Training Method (Gym Heroes #106), with 36 PSA 10 copies out of 194 total PSA grades and a 24.0x Delta. That describes the grading profile; it is not financial advice.