Oddish

Grading with PSA pays if your copy has better than a 31% chance of a 10.

15% of the 223 copies PSA has graded got a 10. People mostly send their cleanest copies, so a typical raw copy's odds are lower.

Raw (NM)

$2.59

TCGplayer

PSA 10

$195.00

16 sales

PSA 9

$42.38

21 sales

If it misses

$31.34

below 10, by PSA's grades