Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in Europe 
. I don’t think there is an active coupon right now – at least in my database.
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
There were country-specific coupon codes published on Couponsfromchina social channels and price alerts. Coupon price may vary by country, because there’re different VAT rates, shipping cost etc. There is a chance that some latest coupons are still working:
Old coupons (from the oldest to the newest): BGKL103, BG4440, BGKL121, BG12ff11, BG57423f, 00c906, BG7f74f7, BG9bee5d, BG3dc50c, BG00c906, ADMITAD2212, BGHU1628, Terence, Tabby20, 2203ActiesNL, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, hoNEYbGdeAlS, BGca3021, BGJUNEGSG9, BGVNKHOATM11, 9OFFSUMMER, Cuponation9, COUPONSDE1wk, BG8ReviTrage, BG73009f, BGcoupon8off, BGGutscheine, BG8OFFCOUPON, TTBLACK5
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for Electronic Biometric Fingerprint Smart Door Lock [EU].
Price records source(s): Banggood
Click on image to enlarge. ![Price history for Electronic Biometric Fingerprint Smart Door Lock [EU]](https://couponsfromchina.com/pricehistory/History28619.png "Electronic Biometric Fingerprint Smart Door Lock [EU] price history")
You can set price alert (for Banggood).