ZZsounds ZZsounds is dishonest Internet

ZZsounds advertises for digital music keyboards that are "like new" which are supposed to be only cosmetically damaged but in perfect working order with the full warrantly.  They sent the keyboard in a box that was falling apart with absolutely no insulation.  We had to buy an adequate box to return it and by bubblewrap.  When I pointed out that they should check keys that stick because it only a few keys, their response was that they have to few workers to check "functionality".  What does that mean - you guarantee it is perfectly working with only cosmetic problems but you can't guarantee functionality?