Not only games themselves, but how about spare consoles? I have to confess that with the really old consoles, having a spare console in working condition is not such a bad idea. There is only one I lack a spare for at the moment, of the early systems, Colecovision.
I do have 2 5200 consoles but that's about the only one I have a spare for. They are indeed old machines. I will be getting a special 25th Anniversary edition of the 7800 which will serve as a second console.
________________________________________ Going to the final frontier...gaming!
One of every Atari 2600 and four Coleco's(but three are iffy at best). I think the toaster Nintendo's get worse just sitting so I use a top loader. I use a Master System adaptor instead of the SMS and I have the old Snes and the newer one.
Two Turbo-16'S and two Odyssey 2's.
It gives me an excuse to hook thing up but really outside of the Nes I have not had much trouble. I changed the 72 pins and the lockout so it does not blink and they still have problems.