Price history, coupons and price alert are available on this page. Let’s see what best price is ATM.
Cable Length (m): 0.6m, Connection: Wired/wireless, Lithium Battery Capacity: 1500mAh, 7200 DPI
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.
Link: Banggood product page
1. ($42.71): AFfbG10
2. ($42.71): BGBFAFF2019
3. ($42.71): BGCITYADS2019
4. ($44.14): aff7off
apply code in your basket (cart) after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): kbsmimouse, 502C6B, e2bcea, TTxBG10, e18b44, BGe28b38, BG3CSUM, BGCPP012
(there’s a little possibility that old coupon will 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 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)).