Most popular, highly used, highest traffic carrying, and classifieds that display most number of daily unique visitors
- gumtree.com
- OLX.com
- http://geo.craigslist.org/iso/us
- http://www.backpage.com/
- http://www.ablewise.com/
- http://www.usfreeads.com/
- http://www.bestwayclassifieds.com/
- http://www.buysellcommunity.com/
- http://www.free2postads.com/
- http://www.adsinusa.com/
- http://www.locanto.com/
- http://www.classifieds.org/
- http://www.ezclassifieds.com/
- http://www.ebayclassifieds.com/
- http://www.adsglobe.com/
- http://www.adoos.com/
- http://www.freeadscity.com/
- http://www.domesticsale.com/
- http://www.classifiedsforfree.com/
- http://www.oodle.com/
- http://www.ziply.com/
- http://www.postfreeads.net/
- http://www.sell.com/
- http://www.marineclassifiedads.com/
- http://www.majon.com/
Next runner ups for the list:
http://www.mcall.com/classified/
http://www.mcmart.com/
http://www.motorcyclesforsale.com/
http://www.monstermarketplace.com/
http://www.quickregister.net/classifieds/