When it comes to the original SOTC, there's audio of a complete Jack Kelly episode, but not many collectors have it (I don't). Wiki says there are five of Joe's Memory Game at UCLA, though I've made several trips there and never seen them.
Wiki sldo says all the SpinOff shows were found, but has anybody actually seen one?
This topic fascinates me as well. I also personally like to make a distinction between clips surviving vs entire episodes. The Girl In My Life just really, really, really wasn't a game show, but it's hard to imagine what other club you'd put it in, so it's a reasonable placeholder until I hear something better.