Just a suggestion, because I bet you are getting exhausted emailing out the list a lot.
You could set up your list on a free website host like ivillage.com, etc...then you could just give people the link to view.
I have also seen people post things for sale on picturetrail.com even though it's technically a photo album free site, but if you had pictures of things, then you could post them there and people could email you regarding whatever they are interested in.
Boy, this sort of rummage sale sure beats sitting in the garage in the heat for 2 days straight, huh?