Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. You can get coupon down below.
Link: Banggood product page
Coupon (51.51 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): BGSTHO15, BGHONEY2110, BGSHOM15, 13f142, BGSHE15, BGCNBASCD, BG10OFFAFF1, BANGGOODSD, ADMITAD2212, BGCityads10, Terence, Tabby20, 2203ActiesNL, BG1efeb0, 8Couponsde, MVC8SPRING, BGb5e65a, hoNEYbGdeAlS, BGHAP13, DealBGimpact, 9OFFSUMMER, BGAHPU13
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Price history (for all/most countries) for Baseus C1 Capsule Vacuum Cleaner is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).