Professor's Research

5%of 39 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 102—

PSA 92527 at 9+—

PSA 8835 at 8+—

PSA 7237 at 7+—

PSA 6037 at 6+—

PSA 5037 at 5+—

PSA 4037 at 4+—

PSA 3037 at 3+—

PSA 2037 at 2+—

PSA 1138 at 1+—

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