Bluetooth 4.0 + 2.4G Double Mode Connectivity Mini Mice.
Basically copy coupon, view price history or create e-mail price alert. What is best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
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. Hmmm… There is no active coupon in Banggood at this moment.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): ca350e, 502C6B, TTxBG10, e18b44, BGRatones, BG3CSUM, bgssaff9, AFfbG10, BGjdsk52, BG11mouse05, 0e7f33, BGSS10%SW, BGAUXMM, BGAFF10OFF, BGCuponation10, 13f142, BGHONEY2110, BGafec62, BGraton
(there’s a little possibility that old coupon will work)
Other warehouses/versions
This item is available in 2 another warehouse/versions!
1. Hong Kong – Xiaomi Bluetooth 4.0 Mouse Gray ($-3)
2. Europe – Xiaomi Bluetooth 4.0 Mouse [EU] ($-3)
Price history and price alert
Here is price history (for all/most countries) for Xiaomi Bluetooth 4.0 Mouse Silver. The lowest price was: $9.99.
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)).
. I can’t tell you if this price is good – not enough records in my database, so I won’t judge. One coupon is available. Cool!