sell retail over the counter

例句：

1. 1. Theysold their house for a good price.
   他们以很好的价格卖掉了他们的房屋。
2. 2.The company is selling its products at a discount.
   该公司正在以折扣价销售其产品。
3. 3.She decided to sell her car and buy a new one.
   她决定卖掉她的车并买一辆新车。