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Brock's Training Method

19%of 43 graded came back a PSA 10. A small sample, so one grade moves it.

How they graded

Every grade

Copies at each grade, how many sit at that grade or higher, and PSA’s price where it lists one.

GradeCopiesPSA price

PSA 108—

PSA 91523 at 9+—

PSA 81336 at 8+—

PSA 7440 at 7+—

PSA 6242 at 6+—

PSA 5143 at 5+—

PSA 4043 at 4+—

PSA 3043 at 3+—

PSA 2043 at 2+—

PSA 1043 at 1+—

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