Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in Hong Kong.
Link: Banggood product page
Coupon (181.99 USD): Cuponation9
Coupon (181.99 USD): BgGoodie9
(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): BG767dfa, Terence, Tabby20, BG1efeb0, MVC8SPRING, COUPONSDE1wk
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Do you need price history chart (for all/most countries) for UMIDIGI A11 Pro Max Helio G80 4/128GB? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).