For 21k I better get more than just a Kiss if you know what I'm sayin.

There is no such thing as derailing a thread regarding a Kiss pinball machine for 21k.
That was derailed form the get go.

The only way I would pay 21k for this would be if Gene Simmons, Ace Frehley, Paul Stanley and Peter Criss personally delivered to my house in full costume and makeup in the middle of a house party.
Even then they better do something epic like upper deck my toilet so I have a good story to tell.

Does anyone care about serial numbers unless its something fancy like serial number 1?

Something like 666 Iron Maiden would be cool too.