Three places to go.

1, the commodity market (preferably providence), has a monopoly counter, a few dollars, just string it up by yourself.

2. If you go to Panjiayuan or Guobao Temple on Saturday and Sunday (which is also a monopoly), you must find it yourself. The price is slightly expensive, tens of yuan.

3, antique city (not a monopoly), also need to amoy, the most expensive, more than one hundred.