All of our laptops must pass functionality testing, and are ready to use out of the box. As for grading:
Firstly, the detailed photos & condition notes are available for most of the products (when applicable). They're aimed to be fair (though critical where needed), to give you a better idea of the condition, from the comfort of your home.
Secondly, the "Quick Grading" indicator (A/B+/B/C) is there to make your shopping easier. They're based on a set of minimum standard (across: the screen, inside casing, outside casing & the battery). The area which receives the lowest Grading is what the overall Grading will be. For instance if the screen is a B but for all other areas it is A, it would be a Grade B laptop. Note: Our laptops are not shipped in the original box.