Gooloo via Amazon offers its Gooloo 12-volt 300 PSI Electric Tire Inflator / Air Compressor for $19.99. Coupon code "TNFFPS8I" drops it to $16.39. Plus, Prime members receive free shipping. That's $44 off and the lowest price we could find. It plugs into your car's cigarette lighter socket and can inflate a standard size tire from 0 to 35 PSI in eight minutes. Features include a 300 PSI maximum pressure, air pressure gauge, 10-foot power cord, and three nozzle adapters.