What to buy depend on your taste and interests...

There is a used/fake antique market in Beijing and a fake/rejected name
brand everything market in Shanghai. Just ask when you are in the
city. Be careful bringing them through customs in the US. I've heard
horror stories where unwitting travellers being assessed thousands of
dollars bringing in DVD's in violation of copy rights. My interest is
in food. Unfortunately I had three diarheas in those three weeks in
China. Good thing is I did not gain any weight.