Right now the best price with coupon code for Xiaomi Mijia Sonic Toothbrush T700 is $77.99 (in Banggood). Go down and check coupons out. Remember to check price history if it is available. Let’s see what best price is ATM.
Latest coupon and price update (UTC):
Executive standard GB 4706.1-2005, Product Name Mijia T700 Sonic Electric Toothbrush, Product color Dark blue, Rated power 4.2W, Net weight About 220g, Charging time 6 hours, Waterproof grade IPX7, Product model MES604, Product size Φ27mmx255mm, Brush material DuPont brush, Charging mode Inductive charging, GB 4706.59-2008, Rated input 5V
Banggood ($77.99)
Banggood warehouse is located in China. There are no coupons available at this moment in Banggood. I think you want to know if the price is good. Hmmm, price is higher than average (which is $77.84 right now), so better set price alert down below…
Link: Banggood product page
Price: $77.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGMJT700, BG9907, BG10OFFAFF, BGwhielabel, 7bcdf9, BG10OFFAFF1, BANGGOODSD, BGHealth06, BGHealth10D, BGXPFE93, 2022ACTIESNL, BGHB218, BGMAYB2429
(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
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Price history (for all/most countries) for Xiaomi Mijia Sonic Toothbrush T700 is here.
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)).