I don't think they are worth much of anything. I've got Space Invaders, Frogger, Defender, Pac Man, Megamania, and one mystery one with no sticker. It's interesting because I know I also had the tank one and pong as well so not sure where those are. In fact, pong was my first game and just discussing this I had a flashback to playing pong for the first time in my bedroom (or, it may have been living room as I don't think multiple TVs in a house was a thing back then...lol; I just remember the part seeing the screen). I also remember playing E.T. and, even at the time, I thought it was gay because all you seemingly did was move this thing around and collect Reese's Pieces. I don't know that I actually owned it but I recall playing it and hating it. I also remember when Intellivision console came out and how superior I thought it was. I was always at my friend's house playing that. And, the controllers were better from what I recall.
I'll catch it on streaming, maybe, a double screening with the new Running man movie Actually, I wonder if Hollywood or mainstream audiences would watch a Conan closer to the original, canon version comic source material, or if Arnold's version is too strong an archetype at this point? Savage Sword of Conan or the Dark Horse version.