Octillery

Grading with PSA pays if your copy has better than an 85% chance of a 10.

25% of the 863 copies PSA has graded got a 10. People mostly send their cleanest copies, so a typical raw copy's odds are lower.

Raw (NM)

$3.21

TCGplayer

PSA 10

$95.84

10 sales

PSA 9

$14.50

23 sales

If it misses

$10.83

below 10, by PSA's grades