Aliexpress
Click here… to search for Huawei Enjoy 9S 4/128GB Black on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (311.13 USD): Email5
Coupon (311.13 USD): bgshOOp10
(CouponsFromChina.com tip: just apply this code in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): 4BGE9S, affiliate6, od7off, BGBFAFF2019, BGCITYADS2019, BGMPB2020
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Price history (for all/most countries) for Huawei Enjoy 9S 4/128GB Black is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).