ATM you can buy 7.4V 60W Portable Tire Air Pump for $30.59 (in Banggood). Just check coupons out (with price alert and history). What is the best price?
Gas flow 45L/min, Battery capacity 2 *2000mah batteries, Material Plastic, Voltage 7.4V, Size 17*7*5cm, Charging time 3-4h, Power Source Pneumatic, M otor No, Power 60W, Product Name Tire Inflator Pump, Product power 60W, Battery life 20-30 minutes, Pressure High Pressure
Latest coupon and price update (UTC):
Banggood ($30.59)
Banggood warehouse is located in China. Well, is it a good price anyway? Maybe there’re no more promotions for this item, because current price is higher than average (which is equal $22.40) One coupon is available. Cool!
Link: Banggood product page
Price without coupon: $33.99
1. ($30.59): BGAMMT03
just apply this code in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Old coupons (from the oldest to the newest): BGLMQ15, BGCAR639, BGRD11CA74, BGSCM11, BG999081
(there’s a little possibility that old coupon will work)
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
Check out price history chart (for all/most countries) for 7.4V 60W Portable Tire Air Pump.
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)).