Right now the best price with coupon code for HABOTEST HT680 HT681 Thermometer Hygrometer is 3.99 USD (in Banggood). You can create price alert here, copy coupons and view price history. Do you want to know what the best price is?
Latest price update (UTC time):
Banggood (3.99 USD)
Banggood warehouse is located in China. I think you want to know if the price is good. Well, according to CouponsFromChina database this price is the best in history (4 records). There is one great coupon!
Link: Banggood product page
Price without coupon: 8.99 USD
Coupon (3.99 USD): BG48729b
(CouponsFromChina.com tip: apply code in your basket (cart) after clicking “Proceed to checkout”. Click to copy code and open shop)
3.99 USD – This is the best price ever noted in my database!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BG482e84, BGbe0af2
(these coupons are old, so probably won’t work)
Aliexpress
Here are coupons that you can use.
Price history and price alert
Do you need price history chart (for all/most countries) for HABOTEST HT680 HT681 Thermometer Hygrometer? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).