Aliexpress
Click here… to search for Xiaomi Gaming Mouse 7200DPI on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (42.71 USD): AFfbG10
Coupon (42.71 USD): BGBFAFF2019
Coupon (42.71 USD): BGCITYADS2019
Coupon (44.14 USD): aff7off
(CouponsFromChina.com tip: paste coupon code in your cart and click Apply after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): kbsmimouse, 502C6B, e2bcea, TTxBG10, e18b44, BGe28b38, BG3CSUM, BGCPP012
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for Xiaomi Gaming Mouse 7200DPI.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).