Just check coupons out (with price alert and history). Let’s see what best price is ATM.
Suggested Usage 2~3 Per Week, Suggested Using Time 2 Mins, Power Supply 2 AA Batteries, Product Power 2.5W, Gear 3 Gears, Product Voltage 3V, Material ABS LCD+Integrated Circuit, Color White, Model Number EB1001, Brand Enchen
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):
Banggood
Banggood warehouse is located in China. There is one coupon available! Pretty cool, huh?
Link: Banggood product page
1. ($11.89): BG75597c
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 and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG8fa86b, BGHECARE1, BG4ee866, BGHOM050
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Do you need price history chart (for all/most countries) for Enchen EB1001 Blackhead Cleaner? There we go.
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)).