Some things go up some go down, the market dictates the price. If you list too high it wont sell. I am not sure why everyone is so fixated on the pricing of other peoples machines. It seems some folks get their panties all in a wad because someone made $500 on a machine. But don't seem to care they lost $1000 on another game. At the end of the day its a hobby, and it should be fun. Life is to short to get all upset over what some wants to sell their game for. It is really up to the rightful owner of the machine....isn't it? It is after all their property, and their decision. If the market wont bare a $20000 MM, then it wont sell. If it does.....well then, I guess the owner sells it.
We live in a capitalist society. You know, the reason you can afford to buy pinball machines at all......You could move if you don't like it......