Vator Box takes a look at SharesPost, an online marketplace to trade private company sharesWith the IPO market in the doldrums for some time, and merger activity still scarce, shareholders of venture-backed companies have had trouble getting liquidity for their stock. The dearth of exits has created a new opportunity for companies such as SharesPost, which launched in June 2009, and SecondMarket, both of which are trading platforms for buyers and sellers of private securities. It’s an active sector. Recently, SecondMarket just acquired its competitor InsideVentures for an all-stock purchase.In this week's Vator Box, Ezra Roizen (Vator Box regular and digital media investment banker) and I take a look at the prospects of SharesPost. Our guest host is Lorenzo Carver, whose expertise is in understanding valuations of startup companies through his company, Liquid Scenarios.