Quoted from Zavadoza:NOB = out of the box, but never been played?
Nobody would do that, so it's a non-existent state.
I think there's entire category of collector who buys new pinball machines. Tears into the box. then experiences so horrible a level of buyer's remorse that they must immediately sell the machine before it devalues more with a single play. they are loosing money but 'just a little less' than if they stood it up and plugged it in.
That or the are fetishisticly attracted to opening boxes and taking things out. I think that's less likely. Its not like there's whole genres of videos featuring that kind of thing. I think its the first thing.
Either way, if you say it out out loud, like a KNOB, it maybe fits.