Go down and check coupons out. Remember to check price history if it is available. What is the best price?
Storage temperature: -35℃-85℃, Emission current: 1-6.6mA, Operating temperature: -40℃-125℃, Operating temperature: -20℃-70℃, Power supply: Solar/USB power cord, Operating Voltage: 2.0-3.6V, Storage temperature: -40℃-125℃, Weight: 72g, Chip: Freescale, Working current: 1A, Sensor: , Nordic, Working frequency: 433.92MHz±43kHz, Size: 78.58*89.92*28.59mm, Operating Voltage: 5V, Air pressure range: 100kpa-450kpa, Battery power: 500mAh
Aliexpress
There’re some similar (or not) items on Aliexpress
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. ($72.89): BG10OFFAFF
2. ($72.89): BGwhielabel
3. ($79.99): 13f142
paste coupon code in your cart and click Apply 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): BgAuMotor, bgaumotor, AM15prime, BGCar1val, BGMiDrive, BGAutos, bGhOnEy10, BGCARELEC, BGCARPRO, BGAFF10OFF
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Check out price history chart (for all/most countries) for Xiaomi 70Mai English Tire Pressure Monitor System.
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)).