At the moment Amazon pretty much dominates online shopping—at least in America—but that wasn’t always the case. Back in 2010 the e-commerce giant bullied Diapers.com, a rival website focused on selling baby-related products, into accepting a $540 million buyout. Now Marc Lore, who co-founded Diapers.com along with a family of online stores, is gearing up to launch a new Amazon competitor called Jet. Lore’s site will take a new approach, basing its prices off the distance between a particular product and the person who wants to buy it. That means some purchases could arrive extremely quickly for a low price, while other could take longer and cost a bit more.