Imagine how rich you would be if you could travel back in time to the early 1990s, when the internet was just taking off, and even most business people hadn't yet realized how it would transform the nature of sales and marketing.  All you'd have to do is register, for $20 a year, a few key domain names, and by now you'd have enough cash to buy your own sports team.

You'd want to grab sex.com, of course.  What others?  Flowers.com?  Baby.com?  Well, it wasn't until Chris Clark, from North Potomac, Maryland, heard that the domain name vodka.com sold for a cool $3 million that he realized he was sitting on a goldmine.

Clark had registered the name pizza.com in 1994 in an attempt to woo a pizza company to his internet consulting firm.  He maintained the rights over the years, and it made him and his partner a small profit as a pizza directory.  After hearing about the 2006 sale of vodka.com, he decided to auction the name through the online auction site, Sedo.

The opening bid?  $100.

The winning bid?  $2.6 million.  Not bad for an initial $20 investment.