In addition to my A500, CD32, and PC, I have a RetroDuo2.0, a couple of Playstations, a Nintendo64, a Dreamcast, a Gamecube, an XBOX360, and various Gameboys.
It seems like a lot when I list it, but most of it is in the closet, and almost all of it was free or close to it.
I really don't see myself buying any more consoles, and my next handheld will probably be a smartphone or tablet.