Real world business valuation is based on earnings (not rev), growth, and stability if you want a really oversimplified answer.
Not suprisingly 'site' valuations seem to be more in line with whatever numbers joe-blow cares to pull out of his ass
Granted ultimatly a site is worth whatever someone is willing to pay for it so who knows maybe joe-blow is on to something.
Either way I'd probally try to get a more reliable source than random board posters if you're serious.
