Because you do not want to purchase items that someone else used, even if it was only used one time. We do not want to sell you items that someone else has used. 2. As you know, the items we carry are manufactured all over Mexico (and other parts of the world) and sold locally in the US for the convenience of our customers. It is not possible for us to return these back to the manufacturers as the management and shipping costs are exorbitant. To entertain any sort of return, we would have to incur at least 30% additional cost, meaning we’d have to pass that cost back to you, the customer. Instead we ask you to ensure you are buying the product you are going to keep and use.