I have lots of stuff I wanted rid of, looked down swapshop list and it seemed fairly out of date, I found a few of the items I wanted to get rid of were being requested, I posted to the users, heard nothing back.
It doesn't seem to work, so a mailing list may be better.
I'd vote for a drop off/pickup box somewhere though specifically for the swapshop otherwise we may end up with junk accumulating in it.