Xiaomi TYJ03TS Sunglasses Pro (Banggood, Aliexpress: Color Gradient Grey, Model TYJ03TS, Brand XIAOMI Mijia, Weight 20g(approx.), Frame Material Stainless Steel+Nylon, Size 60X15X150MM (the best price with coupon)).
Get coupons, create price alert or check price history out! Do you want to know what the best price is?
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 and price update (UTC):
Banggood
Banggood warehouse is located in China. You can get coupon down below.
Link: Banggood product page
1. ($39.15): vipupgrade8
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 and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): Brand2, BGMIglasses
(there’s a little possibility that old coupon will work)
Price history and price alert
Here is price history (for all/most countries) for Xiaomi TYJ03TS Sunglasses Pro. The lowest price was: $37.39.
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)).