Grading Explained :-

Grade A - In very good condition. Screen excellent. Casing/keyboard may show very minor signs of use.

Grade B - Fully working, but shows signs of use. For example, keyboard worn, casing marked, screen marked (barely noticeable).

Grade C - Working but with major fault. For example, screen marked (noticeable when turned on), missing key, casing damaged.

Grade D - Faulty. Not working. Sold as spares or repair only. For example, missing parts, physical damage.