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PSA 10: PriceCharting · last PSA 10 sale $157.50 on Aug 25, 2026 · checked Oct 26, 2026
PSA 9: Median of 1 PSA 9 sale in the last 90 days, latest 2026-10-23. Grade 9 guide (all graders): $33.
Grade 7 and Grade 8 are PriceCharting guides across all graders (PSA, CGC, BGS, SGC, TAG).
GemDelta shows Professor Elm's Training Method (Expedition #148) at $2.39 market price (TCGplayer market). Its Delta multiple is 52.9x.
A PSA 10 Professor Elm's Training Method (Expedition #148) is currently shown at $126. GemDelta labels this as a PriceCharting guide fallback rather than verified recent sales.
GemDelta records a 39.3% gem rate for Professor Elm's Training Method (Expedition #148), with 35 PSA 10 copies out of 89 total PSA grades and a 52.9x Delta. That describes the grading profile; it is not financial advice.
| Date | Listing | Sale |
|---|---|---|
| Aug 25, 2026 | 2002 Pokemon Expedition #148 Professor Elm's Training Method PSA 10 GEM MINT | $157.50 |