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PSA 10: PriceCharting; refreshed Sep 10, 2026
GemDelta shows Blissey (Promo #XY56) at $5.58 market price (TCGplayer market). Its Delta multiple is 15.8x.
A PSA 10 Blissey (Promo #XY56) is currently shown at $76.57. GemDelta labels this as an unverified PriceCharting guide fallback rather than verified recent sales.