Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (46.24 USD): Cuponation9
Coupon (46.75 USD): BG8ReviTrage
(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): BGJUTD903, BGHONEY2110, 13f142, BGISDE903, BGKIDs20off, BANGGOODSD, 6GSGIT, BGTYZX903, BGHealth10D, 2022ACTIESNL, BGHB218, 2203ActiesNL, BGHECARE1, BG4ee866
(these coupons are old, so probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for SPORTMAN SM-615 5 In 1 Electric Hair Clipper.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).