I caught a mac plus that had been hanging out on our local Craig's List for a few weeks. The guy who had it lived a few hours away in Champaign and it included the original box, although it was missing a few things like the keyboard, mouse, and any disks.

He had it advertised on CL for $30 (down from $35) and when I got there, he had a sign on it for $10. He seemed to be running a non-profit to give area folks a place to make/perform art and music and the computer was one of the things that he was selling to keep things going. Someone local could have walked in and picked up a Mac Plus for ten bucks! I gave him $30 for it - it boots, has a nice sharp screen and came with the box, most of the packing intact, the programmer switch, floppy protector, the original simms and 4MB onboard.