Quoted from PinballFever:
Or put them back in the cabs before selling.
I would want the original cab that belongs with the game if I was buying it.
I agree. I do think they are interesting swapped and if a game came to me that way I would probably be ok with it. Still given the option I'd rather have it in the original cab.
At the Chicagoland show one year I saw a Sittin' Pretty in a wedgehead cabinet. It looked kind of cool, like a totally different game. Still an original would be worth more to me.