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Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. There is one coupon available! Pretty cool, huh?
Link: Banggood product page
Coupon (58.07 USD): BGCAPITALOS8
(CouponsFromChina.com tip: paste coupon code in your cart and click Apply 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): BGSawfor33, BGPSAW15, BGherra, BGadf571, BGcd0548, BG123F2021, BGPTL088, BGGines, BGa8f74f, BGGTools8, BGSaleFeb8, BGGTT13, BG20236Tool, BGGT12
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Here is price history (for all/most countries) for Rechargeable Electric Chain Saw with 2 Batteries.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).