Go down and check coupons out. Remember to check price history if it is available. Best price?
Snapdragon 450 Octa Core 1.8GHz, 5.7 inch 1440x 720 HD+ screen, 282ppi, MIUI 9, 16GB ROM memory, 5.0MP front camera and 12.0MP rear camera, B20, Global
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in Hong Kong. CouponsFromChina software could not find any coupon for this product in Banggood.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): 8BGR516C8BGRMI516, 8BGR516RU, 9BGR516C9BGR516CL2, 10BGR516, 10BGR516C, 10BGR516C2, aff7off, od7off, 8BGR516CL, BGaDmITAd, 7bcdf9
(I don’t think these’re gonna work, but you can try ’em out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Hong Kong – Xiaomi Redmi 5 2/16GB Global Blue [HK] ($-3)
Price history and price alert
Do you need price history chart (for all/most countries) for Xiaomi Redmi 5 2/16GB Global Black? There we go.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).