Check out Freecycle.org

It's a network of people in your area who have things they don't want and who want to give them away instead of tossing them in the trash.
The idea is to help keep good, usable stuff out of landfills, etc. "Reduce, Reuse & Recycle" don'tcha' know!

I have Freecycled away two or three old printers and a mini-fridge. I have gotten a bicycle, an Olympus camera and an Omega enlarger.

Ya' gotta' be willing to hustle for things, though.