Xiaomi Aqara Temperature Humidity Sensor [EU] (Banggood, Aliexpress: Note: due to the different production batches, Please download APP “Smart Home” from the Apple Store or Google Play, Temperature detection range: -20 – 60 Deg.C (+ / – 0.3 Deg.C), Powered by a CR2032 button cell (included), Humidity detection range: 0 – 100pct RH (+ / – 0.3pct), Atmospheric pressure detection range: 30 – 110KPa (+ / – 120Pa), there are two different ty (the best price with coupon)).
Price history, coupons and price alert are available on this page. What is the best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in Europe 
. This is new product in my database, so I don’t know if this price is good.
Link: Banggood product page
1. ($13.66): BG86f8e3
2. ($15.99): BGcou931
apply code in your basket (cart) after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): 20XMAQ, d173d2, 950fd5, BG10AQTH, 2019SPEDM, BG9AQTH, aff7off, bgssaff9, BGAqara815, BGPLATMOS, BGaDmITAd, BGAQTH09, 13f142, BGplatmos9, BGBFAFF2019, BGCITYADS2019, BGAQT91, BGATMOS, BGAQ20, BGXMTH02, BGHOMEAPP, BGSMARTHO, BGAQA15, bGhOnEy10, BGSM15, BGSMOFF, BGAQTH7, BGAQTE, bgshOOp10, BGSAMRTH, BGXM1SND, BgcLuBofErtA10, BGAQTEMP, BGAQTHSP, BGAQTHSE, BGAQTHP, BGAQTECZ, BG12AQ2345, BGAQTPP, BG15SH12, BGSTHO15, BGAFF10OFF, BGAQTUK, BGCuponation10, BGAQTASS, BGfdc1b3, BGHONEY2110, BG87ba34, BGff59b6, BGSHOM15, BGcc8c15, BG9bbcd8, BG92e8e9, BGa99dee, BGdf29fc, BGSP316, BGSPC316, BGISOG316, BG687e63, BG579bf1, BGCL1316, BGHO316, 6GSGIT, BG600600, BG7c6a6d, BGb0039f, BGD11046, BGD11316, BG8b53f8, BGB5058, BG317294, BGSmart6, MVC8SPRING, 8BGwbg2204, 2203ActiesNL, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, BGJUNEGSG9, Cuponation9, 9OFFSUMMER
(I don’t think these’re gonna work, but you can try ’em out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – Xiaomi Aqara Temperature Humidity Sensor ($-3)
Price history and price alert
It doesn’t make sense to generate price history chart, because there is one price record which is: $13.99.
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)).