I'm in China, and my partner has a good relationship with ebit. I'm interested in getting 4 or 5 myself. If you want, I could help distribute the machines from within China and save you from getting stuck with the vat on 20 machines.

Disclaimer: I sell miners myself, and run western distribution for one of China's biggest resellers, but in today's market, $4300 is stupid cheap for 18t. You won't get a used s9 that cheap. Probably not even a preorder.