$17.99 – that is current price with coupon for Tuya 2.4G WiFi Video Doorbell (in Banggood). Basically copy coupon, view price history or create e-mail price alert. You probably want to know what is the best price?
Tuya 2.4G WiFi Video Doorbell Wireless HD Night Vision Remote Phone Monitoring Two-way Intercom Alarm Notification Push Motion Detection Intelligent Camera Door Bell – Black
Latest coupon and price update (UTC):
Banggood ($17.99)
Banggood warehouse is located in China. There are no active coupons for this product, but the price is pretty low isn’t it? I think you want to know if the price is good. Good price! It’s lower than average one ($18.56)!
Link: Banggood product page
Price: $17.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG00c906, BG589b2e
(you can check these old coupons out, but these probably won’t work)
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Check out price history chart (for all/most countries) for Tuya 2.4G WiFi Video Doorbell.
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)).