Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (25.99 USD): BGHOM029
Coupon (38.99 USD): BG689ba1
Coupon (47.59 USD): BG4ee866
(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): BG8fcd54, 2022ACTIESNL, BGFitness, BGHB218, BG24bacf, BG97aca1, 2203ActiesNL, tRaDetRaCKeR, BGHECARE1, BG5493e2
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Price history (for all/most countries) for KONKA F5 Massager is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).