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PSA 10: PriceCharting; refreshed Sep 10, 2026
GemDelta shows Professor Elm's Lecture (Lost Thunder #188) at $0.88 market price (TCGplayer market). Its Delta multiple is 47.8x.
A PSA 10 Professor Elm's Lecture (Lost Thunder #188) is currently shown at $66.00. GemDelta labels this as an unverified PriceCharting guide fallback rather than verified recent sales.
GemDelta records a 25.0% gem rate for Professor Elm's Lecture (Lost Thunder #188), with 1 PSA 10 copy out of 4 total PSA grades and a 47.8x Delta. That describes the grading profile; it is not financial advice.