$20.99 – BALDR LCD Digital Wireless Weather Station (Banggood, Aliexpress: BALDR LCD Digital Smart Wireless Weather Station In/Outdoor Thermometer Hygrometer Remote Sensor Alarm Time Clock Weather Forecast – Black (the best price with coupon)).
According to my DB the lowest price is $20.99 for BALDR LCD Digital Wireless Weather Station (in Banggood). Basically copy coupon, view price history or create e-mail price alert. Do you want to know what the best price is?
Latest coupon code price check (UTC time):
Banggood ($20.99)
Banggood warehouse is located in China. I don’t think there is an active coupon right now – at least in my database. But wait a sec… Is it a good price? Maybe there’re no more promotions for this item, because current price is higher than average (which is equal $19.39)
Link: Banggood product page
Price: $20.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/feV
Old coupons (from the oldest to the newest): BGFeb021, BG771307, BG1bb697
(there’s a little possibility that old coupon will work)
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 BALDR LCD Digital Wireless Weather Station. The lowest price was: $17.99.
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)).