Filed under: Car Buying , Auctions , Chevrolet , Dodge , Ford , Jeep , Nissan , Toyota eBay Motors and AutoNation are quickly establishing a reputation for finding new ways to sell cars online. They teamed up for the first time back in March when they tried selling vehicles for half price on the popular auction site. This weekend they’re back with another unique promotion that will see the price for certain vehicles drop every hour until they’re sold. The reverse auctions began at 12:00 PM EST today and will run through 8:00 PM EST on Monday, July 2. Each day about 10 vehicles will be posted for sale with an initial Buy it Now price that matches their MSRP. Every hour their prices will drop according to a list of prices that accompanies each auction. A 2012 Nissan Rogue that kicks off the promotion, for instance, is dropping by $500 per hour. The good news is that there is no limit to how far prices can drop, nor a reserve they need to stay above. The only limiting factor is the other person out there who’s willing to pay $500 more than you. As for what sort of vehicles will be sold via this promotion, the list includes vehicles from Chevy , Dodge , Ford , Jeep , Nissan and Toyota , and includes popular models like the Camaro , Mustang , F-150 , Fusion , Challenger , Charger , Wrangler , Prius C , Camry and more.