I've always given things away for free via Craigslist, but today I decided to try Twin Cities Free Market. So I posted 4 items on Free Market, then just to be sure I posted the same 4 items on Craigslist. Within an hour I'd given away 3 of the 4 things via Craigslist -- and none via Free Market. But I did eventually give away the 4th unclaimed item via Free Market, so that worked out perfectly!
And I'm very excited at the prospect of finding new homes for this stuff -- some of which have been sitting around our house for years!
Just in case you're curious about what I gave away
some ceramic knobs
3 couch cushions filled with goose down
epoxy-covered steel grids from a shelving unit