$19.99 – Xiaomi Mijia T200/T200C Sonic Electric Toothbrush IPX7 Waterproof 31000 Vibrations per Minute with Dual Cleaning Modes Long Battery Life and Portable Features for Smart Oral Hygiene with Type-C Charging – Blue.
Use coupon and get Xiaomi Mijia T200 T200C Sonic Toothbrush for $19.99 (from Banggood). Just check coupons out (with price alert and history). What is the best price?
Latest coupon code price check (UTC time):
Banggood ($19.99)
Banggood warehouse is located in China. I’m afraid that there’s no working coupon in Banggood. Is it cheap? From what I can see this price is higher than average price ($19.74).
Link: Banggood product page
Price: $19.99
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BG996217
(I don’t think these’re gonna work, but you can try ’em out anyway)
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Check out price history chart (for all/most countries) for Xiaomi Mijia T200 T200C Sonic Toothbrush. The lowest price was: $15.99.
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)).