The seller is actually responsible for the cost of return shipping if the item arrived and doesn't match the original description. You can see more info on this here: https://pages.ebay.com/help/policies/money-back-guarantee.html#description
hi, not just if the item arrived doesn't match the description.
if a buyer purchased an item by mistake, or put it this way simply don't like it, and request a return, the seller has to honor it, either by bearing the return postage, or let the buyer keep the item for free with a full refund (including postage).
the marvels of buying on ebay.