An A-Grade machine is in "as new" condition. It is a machine that has been returned to Brother as incorrectly ordered, not required (eg. un-opened machines returned in bulk from a "sale or return" deal) or the unit may have failed on arrival in which case the failed part is replaced by Brother. A full 12 months warranty is included. The included consumables may have been partially used, although are often still sealed. (A-Grades still qualify for most cashback and free warranty promotions, but check the individual promotions terms and conditions to be sure)
If this item is marked as out of stock, then it is best not to place an order as, due to the nature of the product, we do not know when (or if) more stock will become available.