Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. Well, there is one coupon available right now.
Link: Banggood product page
Coupon (64.39 USD): BGCAPITALOS8
(CouponsFromChina.com tip: apply it 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): BG7940df, BG75597c, BG4893f3, BG396831, BG589b2e, JanBGCoupon8, BGSaleFeb8, BGAUGUST8
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Here is price history (for all/most countries) for SKG K6 Neck Massager.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).