Impostor Professor Oak

Grading with PSA pays if your copy has better than a 34% chance of a 10.

21% of the 424 copies PSA has graded got a 10. People mostly send their cleanest copies, so a typical raw copy's odds are lower.

Raw (NM)

$71.28

TCGplayer

PSA 10

$272.00

16 sales

PSA 9

$128.73

23 sales

If it misses

$88.85

below 10, by PSA's grades