Angie and I got a new bed a couple months ago. The old mattress and box spring moved into the guest room and the guest room mattress went to camp. That left us with the guest room box spring... We'd procrastinated about getting a dump permit for awhile when it occured to me that as nothing was wrong with the thing why not try freecycle.
I did and yesterday a guy came and got it. He said his daughter's box spring broke and she was glad to have a replacement. Terrific, I was glad to get it out of the house and glad to not send it to the landfill when there was really nothing wrong with it.