If a company's worth what someone will pay for it, than new rumors put Facebook's value at more than $6 billion. An investment banker told Silicon Alley Insider he sold employees' shares representing 0.1 percent of the company for a valuation "north of $6 billion" at a price in the "mid- to upper-seven figures," which SAI takes to mean $6 million or more. Earlier reports suggested private bankers were trying to move Facebook stock at a $4 billion valuation, so this may be a good deal for the sellers. What happened to Facebook's $15 billion valuation? That was set by a sale of preferred shares to Microsoft, whose purchase of $240 million in preferred shares came with some downside protection and a global ad deal. (Photo by CJ Sorg)

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