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PSA 10: PriceCharting; refreshed Sep 10, 2026
GemDelta shows Professor Birch (Ruby & Sapphire #89) at $0.46 market price (TCGplayer market). Its Delta multiple is 38.5x.
A PSA 10 Professor Birch (Ruby & Sapphire #89) is currently shown at $40.46. GemDelta labels this as an unverified PriceCharting guide fallback rather than verified recent sales.
GemDelta records a 33.3% gem rate for Professor Birch (Ruby & Sapphire #89), with 5 PSA 10 copies out of 15 total PSA grades and a 38.5x Delta. That describes the grading profile; it is not financial advice.