Reshiram-GX

Grading with PSA pays if your copy has better than a 44% chance of a 10.

57% of the 341 copies PSA has graded got a 10. People mostly send their cleanest copies, so a typical raw copy's odds are lower.

Raw (NM)

$9.93

TCGplayer

PSA 10

$174.25

33 sales

PSA 9

$26.97

8 sales

If it misses

$22.57

below 10, by PSA's grades