"used" guns
I understand that when the movie "Dirty Harry" was new, a few weeks later there was a rash of S&W Model 29's on the used market--Apparently a lot of folks wanted Dirty Harry's revolver without thinking about the heavy recoil of a full-house .44 Magnum load, and after running a box of store-bought ammo through the weapon, got rid of it.
As has been pointed out, that's a Good Thing for those of us who are comfortable buying used firearms, and who reload so that we can produce light, easy-to-practice-with .44 Spl loads in .44 Mag cases.
One of the nice things about buying used firearms is that an ordinary person can examine one and immediately discover if there is anything major that is wrong with the gun in question. They're not like a used car where there could be serious hidden defects that only show up after the deal is all done and your $$ is gone.
Playboy Penguin--Trailer-park virgins, indeed! (Haughty sniff) When new guns are "born" they are examined by the factory for correct feed & function. A round or 2 may be sent down the bore. Such guns are still called NIB, and "unfired," and correctly so. A quality-control firing is not the same as a user firing.