When I was updating this page the price was $16.69 for Xiaomi Duka Atuman TH3 Smart Hygrometer Thermometer (in Banggood). Just check coupons out (with price alert and history). Best price?
Latest price update (UTC time):
1/2Pcs Xiaomi Duka Atuman TH3 Smart Hygrometer with WIFI Intelligent Networking Large 4.3-inch LCD Display Indoor Outdoor Temperature Humidity Monitoring Type-C Lithium Direct Charging Compact with Clock & Calendar Function
Banggood ($16.69)
Banggood warehouse is located in China. I don’t think there is an active coupon right now – at least in my database. Is it a reasonable price for this item? Hmmm, price is higher than average (which is $15.29 right now), so better set price alert down below…
Link: Banggood product page
Price: $16.69
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGSNS3
(these codes were not working in latest coupon update, but you can check them out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – Xiaomi 2pcs Duka Atuman TH3 Smart Hygrometer Thermometer ($29.49)
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
Here is price history (for all/most countries) for Xiaomi Duka Atuman TH3 Smart Hygrometer Thermometer.
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)).