I absolutely love going to Swap Shops. You can find a lot of great things some times.
I picked up two Apple Macintosh Pluses and a Macintosh SE for $15 today. They are all fully functional and each came with a Kensington System Saver attached as well.
They are a little dirty, but otherwise they are in great condition so it was an excellent find on my part.
Now I just have to find a spot on my dedicated Compact Macintosh shelving unit for them.. haha.