Here's some places you can post your ads to free. I use them myself and they work for my business. : Hope it's okay to post these here.
http://www.instantmessageboards.com/viewforum.php?f=8
http://www.instantmessageboards.com/viewforum.php?f=70
http://www.instantmessageboards.com/viewforum.php?f=82
http://www.instantmessageboards.com/viewforum.php?f=96
http://www.instantmessageboards.com/viewforum.php?f=98
http://www.instantmessageboards.com/viewforum.php?f=113
http://www.instantmessageboards.com/viewforum.php?f=400
http://www.instantmessageboards.com/viewforum.php?f=610
http://www.instantmessageboards.com/vie ... php?f=1203
http://www.instantmessageboards.com/viewforum.php?f=854
http://www.instantmessageboards.com/vie ... php?f=1163
http://www.instantmessageboards.com/vie ... php?f=1836
http://www.instantmessageboards.com/vie ... php?f=1883
http://www.instantmessageboards.com/vie ... php?f=1962
http://www.instantmessageboards.com/viewforum.php?f=102
http://pub22.bravenet.com/classified/sh ... 1851352799
http://pub2.bravenet.com/classified/sho ... =143617354
http://pub8.bravenet.com/forum/show.php ... =661613518
http://pub8.bravenet.com/classified/sho ... =622319685
http://pub4.bravenet.com/classified/sho ... =310388726
http://pub50.bravenet.com/classified/sh ... 4227141771
http://pub17.bravenet.com/classified/sh ... 1395049597
http://pub9.bravenet.com/classified/sho ... 2848&cpv=2
http://pub10.bravenet.com/classified/sh ... =842186760
http://pub19.bravenet.com/classified/sh ... 1585991688
http://pub47.bravenet.com/classified/sh ... 3962936722
http://www.voy.com/138797/
http://www.voy.com/139210/
http://www.voy.com/103667/
http://www.voy.com/144396/
http://www.voy.com/144693/
http://www.voy.com/22910/
http://www.voy.com/23461/
http://www.voy.com/23742/
http://www.voy.com/23908/
http://www.voy.com/145352/
http://www.voy.com/73301/
http://www.voy.com/58446/
http://www.voy.com/75812/
http://www.voy.com/15967/
http://www.voy.com/36557/
http://www.voy.com/65313/
http://www.voy.com/88198/
http://www.voy.com/192712/
http://www.voy.com/138797/
http://www.voy.com/180889/
http://www.voy.com/89994/
http://www.voy.com/91625/
http://www.voy.com/92250/
http://www.voy.com/94092/
http://www.voy.com/99379/
http://www.voy.com/101580/
http://www.voy.com/103604/
http://www.voy.com/117428/
http://www.voy.com/122713/
http://www.voy.com/123713/