Case could have none-medium shelf-wear.
Good:
None-light edge wear crinkling to inlays.
None-medium scratches to disc.
None-medium scuffs and marks to case. More likely to have shelf-wear to cases, mainly loss of shine and scratches.
Some disc hubs will be damaged but most will still hold the CD in place.
None-medium cracks to case.
Acceptable:
None-high level of crinkling and or water damage.
None-high level of staining to inlay.
None-high level fading to sleeves or pen marks.
None to high level of scratches to disc.
None-high level of shelf-wear to cases. Could be more scuffs and marks to case.
Some disc hubs will be damaged.
None-high cracks to case.