
My fiance's sister came across their parent's old Intellvision after 10, 15+ years of being buried in the storage space above the garage. I took it to clean all the rust n' gunk off it (this is an 'after' picture.) I picked up a game to test it with, since we couldn't find those. What I have learned:
Despite what the retro sites say, you can hook up an Intellvision with an automatic RF switch... provided there's nothing plugged into the other side. I'm currently using an NES adapter with it.
Despite its extended attic stay, it still works.