According to my DB the lowest price is $8.99 for Tuya WiFi Temperature Humidity Sensor With LCD Display (in Banggood). Get coupons, create price alert or check price history out! Do you want to know what the best price is?
Tuya WiFi Temperature Humidity Sensor With LCD Display Smart Life Remote Monitor Indoor Thermometer Hygrometer Via Google Alexa
Latest coupon and price update (UTC):
Banggood ($8.99)
Banggood warehouse is located in China. Too bad there’s no coupon right now in Banggood. I think you want to know if the price is good. Well, according to CouponsFromChina database this price is the best in history (5 records).
Link: Banggood product page
Price: $8.99
This is the best price ever noted in my database!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG589b2e, BGb05e60
(there’s a little possibility that old coupon will 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
Do you need price history chart (for all/most countries) for Tuya WiFi Temperature Humidity Sensor With LCD Display? There we go.
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)).