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PSA 10: PriceCharting; refreshed Sep 10, 2026
GemDelta shows Giovanni's Nidoqueen (Gym Challenge #23) at $10.19 market price (PriceCharting raw (eBay sold fallback)). Its Delta multiple is 8.09x.
A PSA 10 Giovanni's Nidoqueen (Gym Challenge #23) is currently shown at $82.47. GemDelta labels this as an unverified PriceCharting guide fallback rather than verified recent sales.
GemDelta records a 25.7% gem rate for Giovanni's Nidoqueen (Gym Challenge #23), with 35 PSA 10 copies out of 136 total PSA grades and a 8.09x Delta. That describes the grading profile; it is not financial advice.