There's a website called Nextdoor.com where you can post pics of your stuff and sell it or give it away! You could put the bed at the curb and say it's free and the odds are good someone will come get it!

I've gotten all kinds of free plants that way. Come to think of it, some really nice and free kitchen towels too. Check it out, it's very good for keeping up with crime and safety alerts in your neighborhood also.