Go down and check coupons out. Remember to check price history if it is available. Best price?
Product Safety Level Class B, Door Lock Weight 4.2kg, Operating temperature -25°C ~ +70°C, Door Lock Prompt Tone English/Chinese, User Capacity “50x fingerprints / 50x permanent passwords / 25x NFC devices / 25x periodic temporary passwords / 8x one-time temporary passwords”, Door Lock Panel Size 380.9*76.9*25mm, Executive Standard GA 374-2019 / GA/T 73-2015(lock core) / GB21556-2008, Brand Aqara(Ecosystem), Lock Core Security Level Class C (the highest level), Power Supply “8x AA batteries (6V DC / not included) / Type-C emergency power supply (5V DC)”, Working Humidity 0~93% RH / no condensation, Wireless Connection Bluetooth 5.0, Model N100
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):
Banggood
Banggood warehouse is located in China. Only one coupon available!
Link: Banggood product page
1. ($256.22): BGSmart6
paste coupon code in your cart and click Apply after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGn100, BG2020NS, BGAQA15, bGhOnEy10, BG8883, BGLB35, BGL35, BG11518, BgcLuBofErtA10, 7bcdf9, BGCuponation10, BGHONEY2110, BG84617a, BGAQA929, BGeee749, BG4a7a54, ADMITAD2212
(there’s a little possibility that old coupon will work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Aqara N100 Smart Door Lock [EU] ($-3)
Price history and price alert
Here is price history (for all/most countries) for Aqara N100 Smart Door Lock.
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)).