I recently sold a vintage sink and toilet on ebay. The cost of the two items was $450. Shipping and insurance cost $350. Part of the set arrived broken and a claim was filed with UPS. UPS ultimately agreed to pay part of the cost of goods ($350). Buyer has not returned anything to me. As the seller, am I required to refund the buyer the cost of the items ($450), or the cost of the items and shipping (an additional $350)? Thanks for any help as ebay was useless in answering my question.