Aliexpress
Click here… to search for Xiaomi Blasoul Y720Lite Gaming Mouse on Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (52.32 USD): BGMPB2020
Coupon (53.13 USD): 7d18f7
(CouponsFromChina.com tip: you should apply the coupon in your cart 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): 502C6B, TTxBG10, e18b44, aff7off, BGss506, bgssaff9, AFfbG10, BGBFAFF2019, BGCITYADS2019, 2880c7
(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 Blasoul Y720Lite Gaming Mouse.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).