Like New:  Free of any clearly visible dents or chips on the front of the phone. Pretty much Like New! 
Very Good:  Some light scuffing on the side of the device, or some light scratches on the body or the screen! 
Good:  Visible scuffing on the side of the device, as well as hairline scratches on the body or the screen! (Don't worry, nothing that can't be covered up with a case!)