For a site like Facebook, within its 1st year it was worth hundreds of millions. If I make a one-page website which has no content and it gets no traffic, it's worth $0 So probably somewhere in-between there Sorry if this doesn't seem helpful but there's no accurate way to tell without having more information. Again, you need to provide more information.
better you browse these sections http://forums.digitalpoint.com/forumdisplay.php?f=52 or http://forums.digitalpoint.com/forumdisplay.php?f=59