Price history, coupons and price alert are available on this page. Let’s see what best price is ATM.
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Weight 68g, Material ABS, Battery 2x AG 13 Button Cell Battery, Color Skin Color
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($11.89): BG75597c
2. ($12.73): Cuponation9
3. ($12.87): TTSUMMER8
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 and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG9cc7f2, BGHB218, BG785c81, 2203ActiesNL, BGHECARE1, BG4ee866, BG14c65e, BGa39f8d, 9OFFSUMMER
(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 Mini Size Inner Ear Invisible Hearing Aid is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).