MB is a fun game to own. I had Rarehero's on loan for a few months and just really enjoyed it. But I think it's about how much the pin does for you. I love the theme. I love the toys and the art. I love the music and campy callouts. It looks so great with a ColorDMD.
I just personally can't justify the price. It's overly collector inflated, because of the above points. The code is fun, but it's 90s arcade code, it's not meant to be taken home and dissected. But it's still fun to shoot, and the theme keeps it great.
And I've never personally been able to stack all of the modes at once. That's something fun to go for.
I'd sell RZ, you can get more money back out of it apparently, people are flipping them unabashedly for nice margins. That won't last once they're all in circulation, this is IMHO the peak already because of supply and demand.