Several years ago, when the company next door to where I worked moved out, they threw out all their old office furniture into a dumpster. I got a really nice desk and a chair out of it - in fact I use them for one of my computers.

And you can go "closet diving" in one of my closets where I have an old eMachine with Win98(still working) tucked away behind a couple of CTR monitors (also still working.)