Aliexpress
There’re some similar items on Aliexpress in my database. There may be some other items though.
More on Aliexpress… Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (53.04 USD): BGSMOFF
Coupon (57.40 USD): 7d18f7
(CouponsFromChina.com tip: put item in your cart and apply coupon code there after clicking “Proceed to checkout”. Click to copy code and open shop)
Old coupons (from the oldest to the newest): Mumlatzim17, 6OFFXM, 16e906, affiliate6, BGss506, bgssaff9, aff7off, BGaDmITAd, BGBFAFF2019, BGCITYADS2019, 2020CNY, BGAQ20, BGSAMH, bGhOnEy10, BGSM15
(probably won’t work, but you can try them out)
Price history and price alert
Price history (for all/most countries) for Xiaomi Mijia Smart Home Aqara Security Kit is here.
Price records source(s): Gearbest, Banggood
Click on image to enlarge.
You can set price alert (for Banggood).