Aliexpress
Click here… to search for Enchen BlackStone 3CJ Electric Shaver on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. There is one coupon available! Pretty cool, huh?
Link: Banggood product page
Coupon (23.89 USD): BG10OFFAFF1
(CouponsFromChina.com tip: put item in your cart and apply coupon code there 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): BGTT10, BGKEWE332, BGHOMEA15%, BGZASDWED88, BGESHAVER, 13f142, BGFE23Q5, BGCuponation10, BGENC3CJCN, BGHONEY2110, BGAP2711, BG10OFFAFF, BGwhielabel, BGJUN086, BGXPDC11
(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 Enchen BlackStone 3CJ Electric Shaver is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).