LOL. You and I totally disagree on everything. Except your boobs thread
Those are pretty nice, huh?
Look at the action of Flickr, YouTube, Myspace, Facebook, etc. Comparing current deals is a great way to get a sense of the overall market. Same goes for smaller deals like you see on SP, DP, and other forums with marketplaces. Lots of small sites move for 10-15x monthly earnings all the time. Not the 20+ multiple that's going on here.
I guess my problem with that theory is that the value is so subjective. Sure, maybe people can get that and good for them if they can. I just know from experience that even if I had $70K to blow on a site that was doing $10K a month, I'd have to think hard about it and still might not do it because there are so many other little sites that can be had for less than $1000 and are aged well, etc. In fact, I'm working on redeveloping a site right now that has been online since 2001 and makes about $5 a day right now. It cost me nothing (literally) to take it over and experience in that niche says I should be able to have the site to $5K+ a month within 90 days.