AP:

One in six U.S. Internet users have sold goods and services online and 2 percent do so on a given day, a new study found.
Sales are typically done through such online classifed ads sites as Craigslist or through an auction like eBay, the Pew Internet and American Life Project said Sunday.
Those who use the Internet more frequently, have high-speed broadband connections or have been online longer are more likely to be an online seller, the study found.
Online selling is also higher among men, the more affluent and the better educated.