See, I don't buy pinballs trying to "make a profit" because a pinball machine is an inherently deteriorating consumable device. It, like most other devices, requires continual reversal of entropy (input of energy in some form) or it will wind up as dust. Not only that they were explicitly designed to be consumed within a few years originally, hopefully after they earned out. And that they used to do, before the recent distortions showed up in the market making such effectively impossible on a mathematical basis.
This also means I am not selling my pins, because I didn't buy them for the purpose of flipping them to someone else at a helium-inflated price. Since I didn't pay such an inflated price for anything I own I'm unconcerned with how insane folks get; it just garners chuckles, since I bought them to play them.
Actually, you folks ought to hope it's helium in that bubble. I suspect that bubble is actually full of hydrogen, which could get quite interesting.... especially considering the earn-out problem today. That, more than anything else, is why I'm convinced the bubble will not only burst but explode in anyone's face who has been chasing it for the last few years.