NFC device capacity 25, Model Aqara P100, not included)/4xAA battery(6V, Password capacity 50 groups permanent password/25 groups Periodic password/8 groups Disposable password, Color Black, Fingerpringt capacity 50, Wireless connection bluetooth 5.0/Zigbee3.0/WiFi 2.4G, Working humidity 0~93% RH, Suitable for 0-80mm thickness door, not included)/Type-C emergency, Power Supply 6000mAh lithium ion battery(3.8V, Weight Approx 4.6kg, Working temperature -10℃~ + 55℃, Emergency Power Supply Interface Type C, Material Aluminium alloy, Size 400.6×78.6×28.7mm.
Just check coupons out (with price alert and history). You probably want to know what is the best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
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.
Link: Banggood product page
1. ($437.39): BGAFF10OFF
2. ($476.99): 7bcdf9
coupon code has to be applied in shop’s cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGKN89, bGhOnEy10, BGHWDEALS, BgoFErTaSchInA10, BgcLuBofErtA10
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Here is price history (for all/most countries) for Aqara P100 Smart Camera Door Lock. The lowest price was: $333.99.
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)).