I think I have the solution. New, previously owned but unfired and LNIB. No misleading information there. We have stuff like this all the time in the store where I work. My own opinion, if someone else owned it but didn't fire it, it is Like New.
Of course, we get a bunch that "I never even fired it", and it has a cylinder ring, smoke rings and crap in the barrel. "Sorry, we can't sell it as new".
I can remember Dad and I selling a bunch of 44 mags in the early sixties that we bought back and resold as "Almost new, only five (or six) rounds fired, complete with 46 rounds ammo and a pair of silk gloves."