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PSA 10: PriceCharting; refreshed Sep 10, 2026
GemDelta shows Professor Elm's Training Method (Expedition #148) at $2.35 market price (TCGplayer market). Its Delta multiple is 23.1x.
A PSA 10 Professor Elm's Training Method (Expedition #148) is currently shown at $50.00. GemDelta labels this as an unverified PriceCharting guide fallback rather than verified recent sales.
GemDelta records a 40.7% gem rate for Professor Elm's Training Method (Expedition #148), with 35 PSA 10 copies out of 86 total PSA grades and a 23.1x Delta. That describes the grading profile; it is not financial advice.