Per the most recent 2006 Profile of Homebuyers and Sellers from the National Association of Realtors, the typical For Sale by Owner home sold for $187,200 compared to $247,000 for agent-assisted home sales.

In addition, per the NAR 2006 Profile of Homebuyers and Sellers:

Home Buyer & Seller Statistics

Active home search (median):

• Number of Weeks Searched - 8
• Number of Homes seen - 9

Method of Home Purchase, By Use of Internet:

• Agent/Broker - 81%
• Direct from Builder - 10%
• Direct from previous owner whom buyer didn't know - 5 %
• Definitely would use same agent again: 66%
• Actions taken as result of using Internet site: Drove by/viewed a home - 74%
• Walked through a home viewed online - 61%
• Found agent used to search/buy home - 23%

Prior Living Arrangement:

• Owned previous residence - 49%
• Rented an apartment or house - 38%
• Lived with parents, relatives or friends - 9%

Information Sources Used in Home Search:

• Real estate agent - 85%
• Yard sign - 63%
• Internet - 80%
• Newspaper - 55%
• Home book/magazine - 34%
• Open house - 47%
• Builders - 26%
• Television - 11%
• Relocation company - 5%
  

Source: 2006 National Association of REALTORS® Profile of Home Buyers and Sellers