$25.99 – Tuya Zigbee Intelligent Radar Wave Human Presence Sensor (Banggood, Aliexpress: Tuya Zigbe Intelligent Radar Radar Wave Human Presence Sensor 5.8G Millimeter Wave Sense Probe Induction Detector Smart Linkage – Zigbee (the best price with coupon)).
According to my DB the lowest price is $25.99 for Tuya Zigbee Intelligent Radar Wave Human Presence Sensor (in Banggood). Basically copy coupon, view price history or create e-mail price alert. What is the best price?
Latest coupon and price update (UTC):
Banggood ($25.99)
Banggood warehouse is located in China. I can’t find any active coupons for this product in Banggood. Isn’t it too expensive? Well, this price is higher than average price ($24.49)
Link: Banggood product page
Price: $25.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/feV
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Here is price history (for all/most countries) for Tuya Zigbee Intelligent Radar Wave Human Presence Sensor. The lowest price was: $23.99.
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)).