Aliexpress
Click here… to search for XIAOMI YUNMAI Color 2 Smart Body Weight Scale on Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (51.61 USD): vipupgrade8
Coupon (53.93 USD): aff7off
(CouponsFromChina.com tip: just apply this code in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Old coupons (from the oldest to the newest): HHHHHOT, ML15%Pro, BGHM15
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Price history and price alert
Price history (for all/most countries) for XIAOMI YUNMAI Color 2 Smart Body Weight Scale is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).