In a world where you can buy cupcakes, caviar, and coats from vending machines, why not cars? That was Carvana's thinking. The Tempe-based startup is a used auto dealer that puts the entire car-buying process online, from shopping to financing to trade-in. But what happens when you've selected and purchased your next ride? Obviously, you head to the nine-story car vending machine that went up this year at Scottsdale Road and the 202 Red Mountain Freeway, put a special coin in the slot, and wait while the contraption retrieves your vehicle. Of course, there's nothing stopping Carvana from storing their inventory in, you know, a warehouse or some other normal building. It's a publicity stunt, but it's not the worst one we've seen, and it must be a fairly successful one, considering the Tempe machine is one of 15 of these things stationed around the country.