Just check coupons out (with price alert and history). Do you want to know what the best price is?
Network standard: IEEE 802.11b/g/n, Battery: 1200mAh, Pixel: 5 million, Product name: Intelligent visual ultrasonic dental scaler, Auxiliary lighting: 4 spotlight LED lights, Product model: T11 Pro, Brand: Sunuo (Xiaomi Ecological Chain), Waterproof rating: IPX7, Use time: about 120 minutes of continuous use, Charging time: about 2-3h
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. I am tired of searching coupons, but I found one for you…
Link: Banggood product page
1. ($58.90): BGHealth06
you should apply the coupon in your 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): BG09011, BGAFF10OFF, BG19561, BGC9011, BGCuponation10, BGSV9011, 13f142, BGjune55, BGwhielabel, BGjune72, BG10OFFAFF1
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Do you need price history chart (for all/most countries) for Xiaomi Sunuo T11 Pro Ultrasonic Dental Scaler? There we go.
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)).