Aliexpress
Here are coupons that you can use.
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Xiaomi MiJia Door Lock Youth Version [EU] (-3 USD)
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. Hmmm… There is no active coupon in Banggood at this moment.
Link: Banggood product page
Price: -3 USD
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): AFfbG10, 502C6B, BGXMS30, BGBFAFF2019, BGCITYADS2019, BGE13, BGVDay10%off, BGMPB2020, BGAFF10OFF, bGhOnEy10, BGdragonBoat, BGSS10%SW, bgshOOp10, BGXMMJLC, BGELIG0920, BGHALLOWEEN, BgcLuBofErtA10, 7bcdf9, BGCuponation10, BGHONEY2110, BG0d1121, 00c906, ADMITAD2212
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Xiaomi MiJia Door Lock Youth Version [EU] (-3 USD)
Price history and price alert
Do you need price history chart (for all/most countries) for Xiaomi MiJia Door Lock Youth Version? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).