Aliexpress
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Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. There is one coupon available! Pretty cool, huh?
Link: Banggood product page
Coupon (8.82 USD): BGHealth06
(CouponsFromChina.com tip: coupon code has to be applied in shop’s 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): HHHHHOT, healthylifestyle, 6c3474, ML15%Pro, vipupgrade8, BGMas20, 502C6B, BGAFF10OFF, BGHB20, BgoFErTaSchInA10, BGSD89797, BgcLuBofErtA10, BG10OFFAFF, BGwhielabel, BG10OFFAFF1, BANGGOODSD
(probably won’t work, but you can try them out)
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).