The US is about to ban all Norinco products. Chinese small arms have been banned for about 10 years now, but they have been allowed to import other products. But with the new ban on "all things Norinco", this will mean the end of Norinco shotguns, among other things (which aren't considered small arms).
So I expect that the price of Norinco shotguns will go up in the coming years. They might be a good investment.