In recent years, second-hand transactions have become quite common. Nowadays there are more and more secondhand goods in the market, such as secondhand books, furniture, appliances, cars, and so on. Why do so many people like to buy secondhand goods?

　　近几年，二手交易已经变得很普遍。现在市场上有越来越多的二手商品，比如二手书，家具，电器，汽车等等。为什么这么多人喜欢买二手商品呢?