BCC might get a slight premium because I have better options for buyers than Flippa, it has an exceptionally long history, and there's some value from association with me, but websites are not valued like businesses or startups.
There exist plenty of excellent reasons why this is true: extreme risk from sites which are overly dependent on one or two traffic sources, implicit cost of operation often not being counted as a cost by the owner (BCC runs itself... It only requires the very occasional attention of a Rails-competent Ubuntu sysadmin. That's "free" to me but not free to the new buyer, and that sort of stuff adds up quickly when compared to five figure revenues.), transaction costs (time, training new owner or staff, etc) having to get recouped, a risk premium because it is a market for lemons and buyers feel that sellers may sell because of material no disclosed information like "I recently pissed off Google and the site may vanish from the Internet", etc.
Ultimately of course things are worth what a buyer will pay you for them, but market is about 1X for "typical" sites at the moment.