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 (41.85 USD): Cuponation9
Coupon (43.23 USD): BG00c906
(CouponsFromChina.com tip: 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
Old coupons (from the oldest to the newest): BG3e7f5b, 00c906, ADMITAD2212, 2022ACTIESNL, BGAlerabat1, Terence, Tabby20, 2203ActiesNL, BG1efeb0, 8Couponsde, MVC8SPRING, BGapr25a, BGHzb23, BGmay9b, BGmay13e
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Here is price history (for all/most countries) for 23Pcs Replacements for VIOMI S9 Vacuum.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).