Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
Compatible OS Android 5.0 or above; iOS 10.0 or above, Bluetooth Version BT 5.0, Model C2, Brand Mibro, APP Name Mibro Fit, Operating Mode Full-Touch
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 code price check (UTC time):
Banggood
Banggood warehouse is located in China. As you can see I didn’t find any active coupon for this product right now…
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): BGbf11dd, BGac4d60, BGc375b2, BGd5ebb1, BG6a25fe, BG284c49, BG8FORMULAMX
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Here is price history (for all/most countries) for Xiaomi Mibro C2 Smart Watch.
Price records source(s): 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)).