Aliexpress
There’re some similar items on Aliexpress in my database. There may be some other items though.
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
Tuya WiFi Smoke Alarm Sensor | 6.96 USD | – |
 |
Tuya WiFi Smoke Detector | 9.02 USD | – |
 |
Tuya ZigBee Smart Smoke Detector | 9.27 USD | – |
 |
WiFi Smoke Sensor Tuya | 10.16 USD | – |
 |
Tuya ZigBee Smart Smoke Detector | 10.21 USD | – |
More on Aliexpress… Here are coupons that you can use.
Latest coupon and price update (UTC):
Price history and price alert
Do you need price history chart (for all/most countries) for SMOK I – PRIV Kit Black? There we go.
Price records source(s): Gearbest
Click on image to enlarge. 
You can set price alert (for Banggood).