Fair warning. Those things are VERY prone to tears, though they're really snaps. I can barely pull them the damn things off the windows when we change 'em without them breaking.
Also. Next time, see if they're any destroyed discs. They may not work, but they're damn fun to throw around when you're bored. Another thing to watch for are the large cardboard displays. I have Will Ferrel's and John Heder's heads in my trunk right now. I missed the Saw IV display by a day though. Damn that sucked.
Last bit now. I have you beat. I actually got an old printer out of our dumpster. Not sure who left it there. Now we have the old heater from our roof in there. Wish I could pull that beast out.