As an employee of the amazon returns facility a lot of the issue is because of employee error, which is the lack of opening the box and making sure it is the right item being returned, part of the process is sending ot to liquidation to where it is sold at discount prices, warehouse deals sellable to where it becomes a sale although it has cosmetic issues, brand new sellable, and destroy. If they check the box and it is caught as being the wrong item, it is investigated on amazons part to see if it was a item sent back by mistake, an item that was sent out by mistake, or if the costumer is trying to pull a fast one. If it is the wrong item it is an easy fix as long as amazon sells the item that was returned.