Visual grading guide for 33s:
M I only grade M if it has not been played and sealed
NM Near Mint looks like new with no visible scratches
Ex Excellent Very light minor scratches
VG+ Light scratches are evident on close examination.
VG Scratches or scuffs are visible, there will be light background noise. Still a very collectible 33
I don't list 33s below VG as skips are likely.