ATM you can buy Xiaomi MJSXJ11CM Mi C400 4MP 1440P Camera for $62.99 (in Banggood). Go down and check coupons out. Remember to check price history if it is available. You probably want to know what is the best price?
Wireless Connectivity: Wi-Fi IEEE 802.11a/b/g/n 2.4/5GHz, Input: 5V-2A, Operating Temperature: -10°C to 40°C, Resolution: 2560x 1440P, Storage: microSD card (up to 256 GB), Net Weight: Approximately 318g, Item Dimensions: 119x 78x 78mm, Model: MJSXJ11CM
Latest price update (UTC time):
Banggood ($62.99)
Banggood warehouse is located in Hong Kong. There are no coupons for this product in Banggood. Is it cheap? Hmmm, price is higher than average (which is $57.66 right now), so better set price alert down below…
Link: Banggood product page
Price: $62.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGbbb70f
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
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
Check out price history chart (for all/most countries) for Xiaomi MJSXJ11CM Mi C400 4MP 1440P Camera.
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)).