Just check coupons out (with price alert and history). 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):
with 2 Brush Heads and 1 Wall-mounted Holder, Charging time: 6 hours, Battery life: 60 days, Package Contents: 1x Electric Toothbrush (Host), 1x USB Cable, 1x Storage Case, 2x Toothbrush Head, 1x Wall-mounted Holder
Price history and price alert
Price history (for all/most countries) for Xiaomi Oclean SE Sonic Toothbrush SET is here.
Price records source(s): Gearbest
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)).