I know that people ask $12,000 for the Medieval Madness but I have never seen one actually sell for that much. Correct me if I am wrong. It's a bit like selling your car - asking price and sell price are two very different numbers. Good luck with the sale, I wish I could buy it. I have an Stern Elvis for trade (I am original owner in as new condition). I value it at $8500 . Maybe we can do a deal?
You must be new to pinball because plenty of MM's in the past few years have sold for more than $12k.
Oscar sold an MM last month for $11.5k on another forum.
Best 2x trade offers I have received so far (Not from anyone here) - ACDC Pro/POTC/T3 & IronMan/Shadow/Demoman