Basically copy coupon, view price history or create e-mail price alert. You probably want to know what is the best price?
Dimensions 180*158*66MM, Color Blue, Dust cup capacity 0.1L, Name Cordless Vacuum Cleaner, Package Nylon bag + color box, Operating hours About 20 minutes, Material Plastic ABS, Battery Capacity 2*2000 mАh
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 code price check (UTC time):
Banggood
Banggood warehouse is located in China. We have found one coupon for this product!
Link: Banggood product page
1. ($37.79): BGAMMT03
coupon code has to be applied in shop’s 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): BG9f7155, BGCarEle5, BGSCM11, BG845979, BGLMQ15, BGCAR639
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Do you need price history chart (for all/most countries) for 120W 4000Pa Wireless Vacuum Cleaner? There we go.
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)).