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PSA 10: PriceCharting; refreshed Sep 10, 2026
GemDelta shows Brock's Sandslash (Gym Challenge #36) at $4.43 market price (PriceCharting raw (eBay sold fallback)). Its Delta multiple is 8.84x.
A PSA 10 Brock's Sandslash (Gym Challenge #36) is currently shown at $39.16. GemDelta labels this as an unverified PriceCharting guide fallback rather than verified recent sales.
GemDelta records a 20.0% gem rate for Brock's Sandslash (Gym Challenge #36), with 10 PSA 10 copies out of 50 total PSA grades and a 8.84x Delta. That describes the grading profile; it is not financial advice.