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The maths doesn't work on the Promo Lapras ex from Scarlet & Violet Black Star Promos right now. At $10.72 raw against $56.99 for a PSA 10, that works out to -43% ROG. Grading and shipping fees would eat whatever margin is there.
Among the 25 cards in Scarlet & Violet Black Star Promos with PSA 10 sale data, Lapras ex ranks 14th for Return on Grading and 15th by PSA 10 price. Of the 25 Promo cards with PSA 10 sales, it is 14th for Return on Grading. The median PSA 10 in this set sells for $60.00. 5 of the 25 clear a 100% Return on Grading.
