People always ask me different ways to make money online. I like seeing new ways also, so one of the sites I visit everyday is the SitePoint Established Websites for Sale section. People post small and large interenet businesses for sale here everyday.
I don’t visit the page with the intent of buying any websites, but it’s a GREAT place to see different ways people have setup businesses and see how much they make. You’ll often see small side-projects people are trying to sell off, but you will also see the occasional big-time businesses being sold that makes tens of thousands of dollars per month.
Just something to keep in mind!