Quoted from chinosts:MM is the LeBron James of the Pinball World...
As kwiKi said above, all a matter of opinion.
MM is a good game in my opinion, but not any kind of good value in todays market. That doesn't make it worth a penny less than it is. But I'd rather have 4 fun pins valued at $2500 each with plenty left over for burgers and beer than an MM. And right after I say that there will be guys that will say they would rather have that MM. All the games have different values to different people.