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the Common Koffing from 151 is one to leave raw for the moment. Raw copies trade around $0.18 while PSA 10s sell for about $105.00, a 16% Return on Grading. Hold it raw and watch for the graded price to move.
Among the 78 cards in 151 with PSA 10 sale data, Koffing ranks 47th for Return on Grading and 49th by PSA 10 price. Of the 7 Common cards with PSA 10 sales, it is 6th for Return on Grading. The median PSA 10 in this set sells for $131.00. 19 of the 78 clear a 100% Return on Grading.
