I was watching the Yankees/Giants game and there was an advertisement for a store called I Sold It. The commercial goes on to explain that they will sell your stuff on eBay. This store is an exact copy of the one from the 40 Year Old Virgin. their website
They've had these type stores for a long time now. At least 5-6 years. But most of them go bust, since its somewhat of a raw deal they offer their customers. They take about 30-40% of final auction price. Anyone who isn't a grandpa or an idiot should know themselves how to sell on Ebay.