Just check coupons out (with price alert and history). What is the best price?
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):
Product name: Xiaomi HD Webcam, Support system: Windows 10 32/64 bit OS, Drive type: free drive, Material/Color: Plastic Case/Silver, Product size: 90x28x1 8.5mm, Product weight: 34.5g, Wire length: 50cm, Resolution: 1280X720/640X480/640X360, Interface type: USB 2.0
Banggood
Banggood warehouse is located in China. There is one great coupon!
Link: Banggood product page
1. ($15.99): BGUdb18
just apply this code 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): BGMIHDCamera, bGhOnEy10, BGZUZUNC, BGHOMEA15%, BGOCFO060, BgcLuBofErtA10, BGELEHOME17, BGBFHOME98, BGDESE060, BGDEALB060, BGJAFR060, BGJAFOA060, BGFEFR060, BGCNYFE060, BGFETD060, BGMATH060, BGMRDC14, BGAPSE060, BGAPWEEK060, BGAXIAOMI, BGAPSEV060, BGMAYSE060, BGNLXIAOMI, BGMAYXMCAM, BGMAYFO060, BGXIAOMIAU, BGXM060, BGPDHOME80, 13f142, BGLYTD060, BGLYFO060, BGAU060, BGTYOD060, BGSPHOME21, BGTYSR060, BGTYGQ060
(these coupons are old, so probably won’t work)
Price history and price alert
Do you need price history chart (for all/most countries) for Xiaomi Mijia HD Webcam? There we go.
Price records source(s): Gearbest, 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)).