Want Examples of Websites Which Make Money..Stop Searching!
..err...check flippa.com out and check the sold listings.
http://flippa.com/buy/listings/sold?sortby=_price&sortdir=desc
There you go. TONS of info on how much these sites are generating, what the traffic sources are, how much they cost to run and many other things. *edit* changed the link to order the list by highest bid won first. Should help filter out $50 websites.
Don't forget, there are also filters on the left to better refine these results.
I'm telling you, this is a GOLDMINE in the hands of the right person.
Treat it like so.