Huge List of Free Classified Ad Sites

adlandpro.com http://www.adlandpro.com (29,799)
adpost.com http://www.adpost.com (13,696)
adquest3d.com http://www.adquest3d.com (93,701)

backpage.com http://www.backpage.com (1,800)
buysell.com http://www.buysell.com (14,358)

chooseyouritem.com http://www.chooseyouritem.com (27,543)
classifiedAds.com http://www.classifiedads.com (21,558)
classifiedsforfree.com http://www.classifiedsforfree.com (51,097)
classifieds.myspace.com http://classifieds.myspace.com/index.cfm
-- (rank for subdomains is not available, but myspace.com rank = 7)
classifieds.yahoo.com http://classifieds.yahoo.com (rank not available)
craigslist.org http://www.craigslist.org (40!)

domesticsale.com http://www.domesticsale.com (22,194)

economist.com/classifieds http://www.economist.com/classifieds
-- (rank for entire economist.com site = 2,527)
expo.live.com http://expo.live.com/default.aspx (rank not available)
ezilon.com http://www.ezilon.com (14,249)

free-advertising-blog.com http://www.free-advertising-blog.com/index.php (85,891)
freeadvertisingforum.com http://www.freeadvertisingforum.com (40,479)

google.com/base http://www.google.com/base (rank not available)
gumtree.com http://www.gumtree.com (809) - United Kingdom traffic mainly

hoobly.com http://www.hoobly.com (17,291)

inetgiant.com http://www.inetgiant.com (31,545)

kaango.com http://www.kaango.com (25,915)
kijiji.com http://www.kijiji.com (2,603)
kijiji.ca http://www.kijiji.ca (829)

livedeal.com http://www.livedeal.com/index.jsp (13,331)
loot.com http://www.loot.com (37,224) - UK traffic

oodle.com http://www.oodle.com (3,983)
olx.com http://www.olx.com (10,430)
ozfreeonline.com http://www.ozfreeonline.com (79,654) - Australia traffic

recycler.com http://www.recycler.com (23,632)

salespider.com http://www.salespider.com (37,777)
sell.com http://www.sell.com (24,581)

thefreeadforum.com http://www.thefreeadforum.com (38,137)
traderonline.com http://www.traderonline.com (54,212)

usfreeads.com http://www.usfreeads.com (4,383)
uscity.net http://www.uscity.net (22,076)

vflyer.com http://www.vflyer.com (36,709)

Well, that should keep you busy for awhile... LOL