Free sales on Craigslist only happen one way. Put the ad up but list "as is" and "will be on the sidewalk, first come first serve. Don't contact me. When it is gone I will take this ad down". Put said junk on the curb, ignore any email, eyeball it occasionally until it disappears.

I refuse to talk to some dork over a free sale. Just come get it.

If that doesn't work for some reason, relist with a dollar amount sufficient to cover my wasted time in beer, but still "first come first serve, I will not hold it" lingo. I don't have sympathy for all the sob stories that erupt.