I am in the same position. I have 3 pins; Metallica, AFMRLE, and GnR. I want to stick with 3 pins, and really don't want to put much more money into the game room.

GnR is probably the one to go, and I have listed it off and on for a couple of years now. Right now, my best choice would be to trade it for a used Hobbit, but I don't know how likely that is. I have had an offer to trade for a new Hobbit, but I don't want to spend that much to cover the price difference.

I don't play it often right now, but Metallica is the keeper of the group. I am not a good player, and have only scored more than 100 million twice on Metallica in 4 years, but those were really fun games. AFMR is fun, but even when I first got it, I still played Metallica more.

In the ops case, I would probably trade Met for Maiden. The layout of GOTG layout seemed super similar to Met when I played it, so I probably wouldn't trade for that one, unless you just like the theme a lot more.