Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. I found coupon for you. Check this out.
Link: Banggood product page
Coupon (23.79 USD): BG75597c
(CouponsFromChina.com tip: just apply this code in your cart 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): BGHB218, BGXPAP62, tRaDetRaCKeR, BGHECARE1, BG0e0358, BG4ee866, BG121405, BGHOM049, BGf76867, BG36637b, BGf1930b, Cuponation9
(these coupons are old, so probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for Enchen Gentleman 5S Electric Shaver.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).