What is the thing you bought in Taobao that earns more money than your own price?

There is nothing else. For example, the battery of a cordless phone, such as the nose rest of glasses and the handle of a clothesline. Taobao is not only a conceptual bargain-hunting place, but also a good place where you can't find an ornament you want after breaking countless pairs of iron shoes, and the mouse can send it to you at a click.