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Grading Pikachu #18 from Paldean Fates isn't worth it at current prices. Raw copies trade around $0.25 while PSA 10s sell for about $76.00, a -16% Return on Grading. Hold it raw and watch for the graded price to move.
Among the 174 cards in Paldean Fates with PSA 10 sale data, Pikachu ranks 84th for Return on Grading and 86th by PSA 10 price. Of the 4 Common cards with PSA 10 sales, it is 1st for Return on Grading. The median PSA 10 in this set sells for $75.43. 16 of the 174 clear a 100% Return on Grading.