Just check coupons out (with price alert and history). 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 coupon and price update (UTC):
Power 45W Max., Current 6A Max., Battery pack 18650x 2, Input Voltage DC 7.4V, Operating Environment Temperature -10 to 60°C, Model Name Car Tyre Air Compressor, Material Type Metal and ABS, Item Width 8.2inch, Pressure Gauge Range 5-150PSI (support pressure up to 120PSI), Input 5V/2A, Charging Time About 3hours, 2000mAh each
Banggood
Banggood warehouse is located in China. We have found one coupon for this product!
Link: Banggood product page
1. ($52.69): BGCarEle4
put item in your cart and apply coupon code there 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): BGBaseus27196, BGCARELEC, BGBaseus1109, BGBaseus11010, BGBaseus196, BGBaseus199, BGAFF10OFF, BGBaseus165, BGBaseus266, BGSABAUM26, BGJP27196, BGec9ac2, BG10OFFAFF, BGBaseus412, BGBaseus42, BGineedit96, BGsalamtak64, BGwhielabel, BGBaseus152, BGCIP8b9, BGBaseus43, 13f142, BGHU0746, BGHU0745, BG10OFFAFF1, BG54364d, 6GSGIT, BGCIP8bb, BG00c906, ADMITAD2212, 2022ACTIESNL, BGba8ca0, BGCarEle1, BG49e72f, BG828fb6, MVC8SPRING, 8BGwbg2204, BGCarEle3, BGAUTO22, BGdcbfa8, BG0f6049, BG8ReviTrage, BGable721, Cuponation9
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Price history (for all/most countries) for Baseus 150PSI Car Air Compressor Inflator is here.
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)).