You can create price alert here, copy coupons and view price history. What is best price?
Rated voltage: 3.7V, GB 4706.1- 2005/GB 4706, Name: Doctor Bei’s sonic electric toothbrush EO, Rated power: 4.5W, Rated input: 5V=== 1A, 59-2008, Waterproof rating: IPX7, Battery life: about 90 days, Executive standard
Aliexpress
There’re some similar (or not) items on Aliexpress
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
4PCS Replacement Brush Heads For DR.Bei C1 C2 E0 S7 Sonic Electric Toothbrush Heads with Soft Bristle | $2.84 | – |
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. You can get coupon down below.
Link: Banggood product page
1. ($34.20): BGHealth06
coupon code has to be applied in shop’s 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): 13f142, BG10OFFAFF1, BANGGOODSD, 6GSGIT
(these coupons are old, so probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for DR.BEI E0 Sonic Electric 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)).