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 (28.25 USD): 8Couponsde
Coupon (28.25 USD): MVC8SPRING
Coupon (28.56 USD): 2203ActiesNL
(CouponsFromChina.com tip: apply it 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): BGwhielabel, 13f142, BG10OFFAFF1, BANGGOODSD, 00c906, ADMITAD2212, 2022ACTIESNL, BGAlerabat1, Terence, Tabby20, BG1efeb0
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Do you need price history chart (for all/most countries) for 33 pcs. 1S S50 S51 S55 S5 S6 Vacuum Cleaner Spare Parts? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).