You can't really do anything about it unfortunately, nothing lasts forever.
Good thing is though that old consoles don't seem to die. My Neogeo & Megadrive consoles are over 20 years old and they still work great. I don't expect my 360 or PS3 to last as long, probably because technology is much more complex nowadays and more problems can arise.
If you want to just play the games, you might be better off experimenting with emulators to begin with. It'll be far cheaper, but having said that, some purists insist that there's nothing like playing on the real thing.
Most of us here are into collecting current games moreso than the retro stuff.