Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. I don’t think there is an active coupon right now – at least in my database.
Link: Banggood product page
Price: -3 USD
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
There were country-specific coupon codes published on Couponsfromchina social channels and price alerts. Coupon price may vary by country, because there’re different VAT rates, shipping cost etc. There is a chance that some latest coupons are still working:
Old coupons (from the oldest to the newest): BG7ea171, BGd1345e, BG1412a8, BG39d24d, Terence, 2203ActiesNL, tRaDetRaCKeR, BGGarden20, BGGines, BGa8f74f, JanBGCoupon8, BGSaleFeb8, BGSaleAD, BGGTT13, BG20236Tool, BGGT12, BGCAPITALOS8, BGCOUPERT8, BG8FORMULAMX, BGBFDAY8
(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 NASUM 20V 4Ah Leaf Blower with 2 Batteries US Plug is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).