Groupon opens up a new marketplace, aiming to undercut Amazon, eBay by Tricia Duryee on April 1, 2015April 1, 2015 at 10:50 am Groupon has launched what it is calling Groupon Stores, a third-party marketplace that will require participating merchants to sell their products at prices 5 percent lower than anywhere else online. Groupon Stores will… Read More