3. Domaining and the Online Real Estate Trade
This is the business of buying, selling, developing and making money from domain names. A domainer purchases many domain names and sells them to interested buyers. This is similar to real estate investing offline and domainers also make money by developing websites and reselling it to a buyer.
This practice is known as site flipping and can make you a tidy sum of money if you know how to build an attractive and profitable website. For a rough estimate of how much money you can earn from site flipping, check out the SitePoint Marketplace to browse through the collection of websites for sale.