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PSA 10: PriceCharting; refreshed Sep 10, 2026
GemDelta shows Rillaboom (Promo #SWSH006) at $148 market price (TCGplayer market). Its Delta multiple is 6.74x.
A PSA 10 Rillaboom (Promo #SWSH006) is currently shown at $250. GemDelta labels this as an unverified PriceCharting guide fallback rather than verified recent sales.