One Person's Junk

So, I have some things that I would like to get rid of, as I am sure most of us do. I was thinking that maybe we could have a large group garage sale. We can either use the money as a fundraiser or just give the money to whoever brought the item. If we have one large sale then we can take out an ad in the newspaper during someone's neighborhood garage sale day. What are your thoughts on this? Do you have some stuff hanging around that you don't want or could you use some extra cash for that summer vacation?