Aliexpress
Click here… to search for Multipoint Head Scalp Massager on Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. Well, there is one coupon available right now.
Link: Banggood product page
Coupon (8.82 USD): BGHealth06
(CouponsFromChina.com tip: this code has to be applied in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Old coupons (from the oldest to the newest): HHHHHOT, healthylifestyle, 6c3474, ML15%Pro, vipupgrade8, BGMas20, 502C6B, BGAFF10OFF, BGHB20, BgoFErTaSchInA10, BGSD89797, BgcLuBofErtA10, BG10OFFAFF, BGwhielabel, BG10OFFAFF1, BANGGOODSD
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for Multipoint Head Scalp Massager.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).