When I was updating this page, then coupon price was $22.99 for Aqara T1 Smart Zigbee 3.0 Light Sensor (in Banggood). Price history, coupons and price alert are available on this page. What is the best price?
Aqara T1 Smart Zigbe 3.0 Light Sensor Auto Smart Home Light Detector Brightness Sensor Magnetic APP Control Work with Alexa Google Assistant Homekit
Latest coupon code price check (UTC time):
Banggood ($22.99)
Banggood warehouse is located in China. I couldn’t find any coupon for this product on latest product update. You probably want to know if this is a good price. This price is higher than average price ($22.29) for this item.
Link: Banggood product page
Price: $22.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
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
Price history (for all/most countries) for Aqara T1 Smart Zigbee 3.0 Light Sensor is here.
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)).