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PSA 10: PriceCharting; refreshed Sep 10, 2026
GemDelta shows Serperior (Promo #BW20) at $7.02 market price (TCGplayer market). Its Delta multiple is 33.0x.
A PSA 10 Serperior (Promo #BW20) is currently shown at $132. GemDelta labels this as an unverified PriceCharting guide fallback rather than verified recent sales.