Operating Humidity: 0-95%RH，no condensation, Dimensions: 65x65x56mm, Execution Standard: GB/T1002-2008, Technical Specifications: 4000W-16A MAX, Name: Air Conditioning Controller P3, Operating Temperature: -10°C ~40°C, GB/T 2099.3-2015, 250V-, Zigbee3.0 IEEE 802.15.4, Battery Model of Temperature And Humidity Sensor: CR2032, Q/QLML006, GB/T 2099.1-2008, Wireless Protocol: WIFI IEEE 802.11 b/g/n 2.4GHz, Model: KTBL12LM.
Just check coupons out (with price alert and history). Let’s see what best price is ATM.
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.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($50.14): BGSHOM15
2. ($53.09): BGHONEY2110
you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGAQP3, BGSMOFF, bgshOOp10, BGSAMRTH, 7d18f7, BgcLuBofErtA10, BGAFF10OFF, BG15SH12, BGSTHO15
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Do you need price history chart (for all/most countries) for Xiaomi Aqara Smart Air Conditioning Controller P3? There we go. The lowest price was: $45.04.
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)).