One last KEY point, in least IMHO. Do not provide a link to your pictures in the Craigs List ad, except as possible additional pictures. You need to imbed the pictures into the text of the ad, full size, using HTML. DO NOT use the crappy attach a picture function on Craigs List. That will give you a postage size pic. Depending where you are hosting pictures (I use Flickr), it should be pretty obvious. In Flickr, I just copy the HTML below the pic, and insert it directly into the ad.