While house sitting for someone I notice their vehicle had a flat. Went over to AZ to pick up some canned air so they wouldn't come back to an undrivable car. Was greeted as soon as I walked in the door and sent right to section I needed.
Noticed the canned air was about $10 for SUV tires - then noticed the spiffy little contraption that plugs into your cigarette lighter, lets you set the PSI, then automatically inflates the tire for you. Bonus - it was on sale for $25 and can be used forever unlike the canned air. And stored in my trunk in case of emergencies.
May be the best $25 I've ever spent on my car.