A Grade - Pristine to Excellent condition will show no to little or minor signs of wear. Item has been fully tested/inspected and is in full working order. (May also still include original foil or new adhesive on the back)
B Grade - Good condition that will show moderate signs of wear. Item has been fully tested/inspected and is in full working order.
C Grade - Average condition that will how signs of heavy wear but has been fully tested and in full working order.