Aliexpress
Click here… to search for Digoo DG-CX10 Oral Irrigator on 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 (30.59 USD): BGDigoo15%
Coupon (32.39 USD): TTxBG10
(CouponsFromChina.com tip: you should apply the coupon 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): 7fa308, 50DGPO, 32ffcb, 5c17ef, CODE1573, 0404digoo, f63a85, 140af9, ed2b86, e2bcea, vipupgrade8
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for Digoo DG-CX10 Oral Irrigator.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).
New coupon for Banggood: f63a85
.