Price history, coupons and price alert are available on this page. You probably want to know what is the best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
, Age Group: Adults, Brand Name: OCLEAN, Type: Acoustic Wave, Brand Name: OCLEAN, Item Type: Electric Toothbrush, Model Number: Oclean F1, Commodity Quality Certification: 3C, Quantity: 2, Material: Plastic, Size: 19.2*6.8*3.1, Bluetooth Connection: NO, , APP CONTROL: NOT SUPPORT, Commodity Quality Certification: CE
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($32.99): BGMAY079
2. ($44.99): BG10OFFAFF
3. ($44.99): BGwhielabel
apply it 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): BGBG2PCS2, BG2PCS2
(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 2 pcs. Oclean F1 Sonic Toothbrush.
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)).