I know a couple of people who have ordered from Ali Ex/Baba without issues. Being in Australia they've been almost a third of the price.
Advice is to try and find the manufacturer on Ali Baba and you can see if they are certified. In China wheel manufacturing is government regulated, so if you're not buying really cheap rims you are more likely to get good quality than not especially if you look out for forged ones.
Check out WOAFORGED / Yizheng Zejiang Industrial Design are DOT Approval certification, they sell a Polestar Edition rim, I don't know if it's a replica or if's a backdoor OEM. Their rims are T6 6061.
I bet your local wheel shops just buy the same and then double/triple the costs. But as always when buying from overseas do your research first.