Looking at it the shipping doubled as well used to be around 45$ per piece now it's around 80$, I would also believe that the import charge for customs is going to go up as well.
Reasons not to buy S9s:
1 - Each one requires it's own network connection. That means more cable, more addresses, and more maintenance.
2 - Import fees.
3 - Low quality hardware. May be more efficient, but your efficiency goes down the tube if it arrives DOA, and dies part way through.
4 - Their warranty process sucks. You have to send to China, and then they may declare it's not their fault.
5 - It's Bitmain.
M