Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in Europe . Only one coupon available!
Link: Banggood product page
Coupon (134.99 USD): 7d18f7
(CouponsFromChina.com tip: apply code in your basket (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): Email5
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Here is price history (for all/most countries) for UMIDIGI A3 Pro 3/32GB Gray [EU].
Price records source(s): Gearbest, Banggood
Click on image to enlarge.
You can set price alert (for Banggood).