Freecycle.org gives new meaning to the adage "one person's junk is another person's treasure." The site is essentially a giant extension of the Craigslist free section. The nonprofit movement is made up of thousands of people who are giving (and getting) stuff for free in their own towns and cities. While it may sound a bit sketchy, I've found a ton of great vintage techie items and valuable record collections and could waste hours away just checking out all of the geek gear.
Each local group is moderated by a local volunteer, and while membership is free, you have to sign up for a local group. Why recycle when you can Freecycle.org, right?