Interesting, I went to Alibaba's website, https://www.alibaba.com/
, and typed in Airstream. Several choices come up, all at like 20% of US prices. And they say shipping is available.
If it is legal to ship to the US I expect that at these prices they probably have had buyers here. So beware little used underpriced "Airstreams"!
I suspect the quality is not very good, and it might be obvious looking closely at one that it is not an Airstream. Would be interesting to know if anyone has actually seen one.