Aliexpress
Here are coupons that you can use.
Other warehouses/versions
This item is available in 2 another warehouse/versions!
1. Europe – Xiaomi Mi8 6/256GB Black [EU/ES] (-3 USD)
2. Europe – Xiaomi Mi8 6/256GB Gold (-3 USD)
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in Hong Kong. I couldn’t find any coupon for this product on latest product update.
Link: Banggood product page
Price: -3 USD
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): 8BGM86256, 8BGM86257, 8BGM8625EU, 8BGM8626, 9BGM8256, 10BGM8256, 11BGM8256
(I don’t think these’re gonna work, but you can try ’em out anyway)
Other warehouses/versions
This item is available in 2 another warehouse/versions!
1. Europe – Xiaomi Mi8 6/256GB Black [EU/ES] (-3 USD)
2. Europe – Xiaomi Mi8 6/256GB Gold (-3 USD)
Price history and price alert
Do you need price history chart (for all/most countries) for Xiaomi Mi8 6/256GB Blue? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).