Here are the largest sites online to place free classified advertising.

http://classifieds.yahoo.com/ Alexa Rank: 1
http://classifieds.myspace.com Alexa Rank: 5
http://www.craigslist.org/ Alexa Rank: 28
http://adlandpro.com/ Alexa Rank: 1,298
http://www.backpage.com Alexa Rank: 2,133
http://www.oodle.com/ Alexa Rank: 5,501
http://www.adpost.com/ Alexa Rank: 6,906
http://www.sell.com/ Alexa Rank: 13,471
http://www.adquest3d.com/ Alexa Rank: 22,252
http://www.chooseyouritem.com/ Alexa Rank: 19,569
http://www.domesticsale.com/ Alexa Rank: 24,207
http://epage.com/ Alexa Rank: 24,834
http://postaroo.com/ Alexa Rank: 43,471