Quality Grading:

SS Still Sealed
Never opened. Flawless, with no damage whatsoever.

M- Mint Minus / NM Near Mint
Has been opened, but is still flawless
with no damage whatsoever.

VG+ Very Good Plus
Vinyl: May have scuff marks and signs of some wear but
will still play almost perfectly throughout, with only
"barely detectable" crackles or pops. A slight noise at the
begining is allowable, but the remainder must be nearly flawless.
Cover: May only have the slightest signs of normal wear.

VG Very Good
The majority of records (worth selling) fall under this grade.
Vinyl: May crackle, pop or make other annoying noises, but only
occasionally,never continuously, and not more loudly than the
music being listened to.
Cover: Normal used cover wear such as ring wear and split seams.
If there is abnormal damage such as tears or markings,
but the seller still feels that it qualifies as a "VG",
the damage must be described in comments attached to the item.

G+ Good Plus
Vinyl: May have continuous crackles, pops, etc... but not so loud as to
make the music completely unlistenable or unenjoyable to the
casual listener. Cover: More than normal wear and tear.