Vinyl LP Grading Guide:

SS = Still Sealed an unopened recorded.
NM = Cover has very little wear if at all, LP No marks can be seen looks unplayed.
VG = Cover may have very slight wear but looks near new, LP may have a couple very light paper scuffs no scatches looks to be played very little.
VG = Cover shows some use slight ring wear may have slight corner ding, LP shows a few more scuffs may have a very few light scatches that will not affect play.
VG = Cover shows more wear than VG , LP shows a few more scatches