Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. I am tired of searching coupons, but I found one for you…
Link: Banggood product page
Coupon (51.62 USD): Cuponation9
(CouponsFromChina.com tip: just apply this code 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): BGYCR75, AFfbG10, BGYCS84, BGYCK50, affbg10, BGSMB5, BGFSE46, BGCITYADS2019, BGVDay10%off, BGAFF10OFF, bGhOnEy10, BGCS5227, BGRSHOES, BGwhielabel, 13f142, BG10OFFAFF1, BG4d9120, BG1074d6, 00c906, BG98a77f, 2022ACTIESNL, BGShoes111, BGOT666, BGaa4e68
(these coupons are old, so probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for Xiaomi Youpin YUNCOO Shock Absorption 40-45 Shoes.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).