Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (8.92 USD): BG75597c
Coupon (8.99 USD): BG6462d9
Coupon (8.99 USD): BGbd539c
(CouponsFromChina.com tip: apply code in your basket (cart) after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Price history and price alert
Check out price history chart (for all/most countries) for 10 Frequency Masturbator Glans Training Exercise.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).