Aliexpress
Click here… to search for UMIDIGI Power 5 4/128GB G25 6150mAh on Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in Hong Kong. I found coupon for you. Check this out.
Link: Banggood product page
Coupon (154.69 USD): BGGutscheine
(CouponsFromChina.com tip: you should apply the coupon 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): 13f142, BG9892a9, 6GSGIT, Terence, 8BGwbg2204, 2203ActiesNL, pROMo8cuPoN
(there’s a little possibility that old coupon will work)
Price history and price alert
Do you need price history chart (for all/most countries) for UMIDIGI Power 5 4/128GB G25 6150mAh? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).