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Grading Magcargo from Temporal Forces isn't worth it at current prices. A -92% Return on Grading comes from the spread between $0.13 raw and $7.53 graded. Hold it raw and watch for the graded price to move.
Among the 91 cards in Temporal Forces with PSA 10 sale data, Magcargo ranks 91st for Return on Grading and 91st by PSA 10 price. Of the 8 Rare cards with PSA 10 sales, it is 8th for Return on Grading. The median PSA 10 in this set sells for $59.20. 5 of the 91 clear a 100% Return on Grading.