S9i-14TH/s with PSU      https://shop.bitmain.com/?lang=en
763 USD

In addition, coupons can be used. Each old buyer has at least one 100USD coupon to use.
The maximum size of  coupon, what can use at this purchase is 500USD

This is S9i-14TH/s miner + PSU+shipping all over the world and only for 400USD

You will never be able to compete with Bitmain in the price of a miner.

And  Bitmain writes :"Bitmain does not have official resellers".