When I was updating this page, then coupon price was 89.99 USD for Digital Weather Station with Outdoor Unit (in Banggood). Just check coupons out (with price alert and history). Do you want to know what the best price is?
Latest coupon code price check (UTC time):
Banggood (89.99 USD)
Banggood warehouse is located in China. So I have checked for active coupons (all category coupons and old ones), but there was no working coupon in Banggood. Low/high price? Maybe there’re no more promotions for this item, because current price is higher than average (which is equal 85.99 USD)
Link: Banggood product page
Price: 89.99 USD
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
There were country-specific coupon codes published on Couponsfromchina social channels and price alerts. Coupon price may vary by country, because there’re different VAT rates, shipping cost etc. There is a chance that some latest coupons are still working:
Old coupons (from the oldest to the newest): BG20236Tool, BGBFDAY8, BGNEWYEAR8
(these codes were not working in latest coupon update, but you can check them out anyway)
Aliexpress
Here are coupons that you can use.
Price history and price alert
Check out price history chart (for all/most countries) for Digital Weather Station with Outdoor Unit.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).