Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. There is one great coupon!
Link: Banggood product page
Coupon (142.70 USD): BGGines
(CouponsFromChina.com tip: you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
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): BGa62085, BG8e8c84, BG123F2021, BGcec6cb, BGPTL088, BGa8f74f, BGe718c0, BG8eba99, BGGTools8
(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 NASUM Mini Chainsaw 6-Inch Electric Chainsaw? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).