Gengar

Grading with PSA pays if your copy has better than a 9% chance of a 10.

25% of the 4,536 copies PSA has graded got a 10. People mostly send their cleanest copies, so a typical raw copy's odds are lower.

Raw (NM)

$27.21

TCGplayer

PSA 10

$585.81

43 sales

PSA 9

$65.60

62 sales

If it misses

$62.45

below 10, by PSA's grades