Customers often come to Larry looking for special pieces. In order to meet customer needs, Larry often accepts orders and then travels looking for the desired item, which he purchases and delivers to the customer. The pieces are expensive, and Larry requires customers to demonstrate their sincerity by providing deposits. If it turns out that the item costs more than expected, Larry contacts the buyer and asks for additional funds. If the item costs less than expected, Larry refunds the excess amount. Also, Larry sometimes returns amounts he received in advance because he is unable to find what the customer wants. What tax issues should Larry's Art Gallery consider?