$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.
When I was updating this page, then coupon price was $19.99 for Xiaomi Mijia T200 T200C Sonic Toothbrush (in Banggood). Price history, coupons and price alert are available on this page. Let’s see what best price is ATM.
Latest price update (UTC time):
Banggood ($19.99)
Banggood warehouse is located in China. I couldn’t find any coupon for this product on latest product update. Price? Well, 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
(these coupons are old, so probably won’t work)
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)).