There's also one in Iowa City at the Deadwood bar. (At least there was a few months ago when I asked my brother what games they had out, he messaged me these pictures, it's the one in the corner)
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I played MM tons since the late 90's at several locations in Iowa City. It's a great pinball game. But my jaw dropped when I saw what the "collectors" had driven the prices to. The one at the Deadwood got beat to crap over the many years it was there, got fixed up, and got beat up again. I have no idea what condition it is in now (I didn't make it to the Deadwood when i was in IC a couple weeks ago, which is sad).