When I was updating this page, then coupon price was $8.99 for DUKA Atuman Temperature Humidity Meter (in Banggood). Just check coupons out (with price alert and history). Let’s see what best price is ATM.
Latest coupon code price check (UTC time):
Xiaomi DUKA Atuman Temperature Humidity Meter LCD Digital Thermometer Hygrometer Sensor Gauge Weather Station Clock Home Indoor Use
Banggood ($8.99)
Banggood warehouse is located in China. I couldn’t find any coupon for this product on latest product update. The question is – is it a good price? Hmmm, price is higher than average (which is $8.85 right now), so better set price alert down below…
Link: Banggood product page
Price: $8.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG73ce40
(these codes were not working in latest coupon update, but you can check them out anyway)
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
Check out price history chart (for all/most countries) for DUKA Atuman Temperature Humidity Meter.
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)).