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PSA 10: PriceCharting; refreshed Sep 10, 2026
GemDelta shows Grass Energy (Gym Challenge #129) at $1.32 market price (PriceCharting raw (eBay sold fallback)). Its Delta multiple is 7.95x.
A PSA 10 Grass Energy (Gym Challenge #129) is currently shown at $10.50. GemDelta labels this as an unverified PriceCharting guide fallback rather than verified recent sales.
GemDelta records a 33.3% gem rate for Grass Energy (Gym Challenge #129), with 4 PSA 10 copies out of 12 total PSA grades and a 7.95x Delta. That describes the grading profile; it is not financial advice.