Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. One coupon is available. Cool!
Link: Banggood product page
Coupon (56.94 USD): BG2646
(CouponsFromChina.com tip: 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
Old coupons (from the oldest to the newest): ff2e7f, Hardware, TTxBG10
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Price history (for all/most countries) for Xiaomi YOUJIA K1 Smart Key Storage Lock Box Fingerprint Bluetooth is here.
Price records source(s): Banggood
Click on image to enlarge.
You can set price alert (for Banggood).