New (as per ebay guide): New/Unplayed/Factory sealed
Like New (as per ebay guide): New/Unplayed/Unsealed (majority of uk new release are actually unsealed from factory)
Tip Top: Used, but like new, no scratches/marks to disc, cover as new
Near Tip Top: Just not quite as tip top
Excellent: may have one or two minor scratches/marks
Very Good: few light scratches (do not affect play)
Any discs with heavy scratching (play tested ok) or damaged covers will be stated in item description