I gave up on selling an item and changed it to free. I was surprised when it did not pop back up at the top of the list. I understand why little changes shouldn't count or people might keep making a minor edit every few days just to stay at the top, but changing an item to free seems like it...
I saw this on another forum and thought I'd post it here in case some of you hadn't seen it. I had never thought of it before.
http://www.youtube.com/watch?v=-l4suyL84-w&feature=email