A-Stock means it's in very good condition. This will vary some depending on the age of the phone. Newer phones should look new or slightly used, older phones may show a little more age. Discolored "yellowed" phones will have been re-finished or painted.

C-Stock means there may be a small scratch, slight discoloring, or other minor problems with the look of the phone. They still look and work great! still 100% refurbished.... and carry a 1 year warranty.

If you are not concerned with your phone looking new..
Save money by choosing C-stock. (if available)
Usually 10% or more!
We don't sell the really ugly phones. (we use those for parts)