Quoted from Mr_Tantrum:I started and lived with one game for nearly 3 years until I saved up enough for my second, and my third shortly thereafter (all I have room for . . . well, that's what my wife tells me).
During the time when I only had one, I really learned about pinball in a multitude of ways. I taught myself how to maintain it, how to perform electrical repairs, and I took the time to really learn how to play the game (Getaway). I also credit only having one game to my getting into and designing custom decals and mods. If I had several early on, I would have probably been too busy playing and upcoming them all instead of taking time to design mods for them all. It was very disappointing when things were wrong and I couldn't play for several days because I was waiting on a part I had ordered.
If you really like Shaq, then I would keep it for a period of time. If you are neutral about it, then I would make the extra $400 and make it your goal to find another title you would like and make it happen.
I agree with this advice and would sell the Shaq. You'll have a brand shiny new Stranger Things and I personally wouldn't want it sitting next to some crappy old game.