Use coupon and get Tire Inflator Portable Air Compressor 150PSI for $27.99 (from Banggood). Price history, coupons and price alert are available on this page. What is the best price?
Latest coupon and price update (UTC):
Piston diameter: 19mm, Additional functions: pressure measurement / power bank / lighting / warning, Length of air hose: 200mm±10mm, Air volume: 35L/min, Product Name: Wireless Air Pump, LED lighting lumen value: 20LM, Use time: 40min, Working voltage: DC 7.4V, USB line voltage: 5V, Cylinder size: 19 cylinders, Noise: less than 85db, Working current: ≤7A, Power: 80W, Product size: 49*87*135mm, Battery capacity: 4000mAh lithium battery, Accuracy: ±1.5psi, Maximum Air Pressure: 150psi, Charging time: about 2-3 hours
Banggood ($27.99)
Banggood warehouse is located in China. So I have checked for active coupons (all category coupons and old ones), but there was no working coupon in Banggood. Low/high price? From what I can see this price is higher than average price ($26.88).
Link: Banggood product page
Price: $27.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGCarEle5, BGdb3739, BGb55382, BG5ef085, BG97f500, BGe411a7, BGXIFD456, BG5081b3, BGSCM11, BG562cee, BG845979, BG5acef2, BGfe9998, BGLMQ15, 5cd1c7, BG5eee49, BGHOBBY181, BG92812c
(these codes were not working in latest coupon update, but you can check them out anyway)
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Here is price history (for all/most countries) for Tire Inflator Portable Air Compressor 150PSI.
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)).