Things I’m curious about (this is rhetorical; I’m not expecting anyone to know):
how many were turned in by the same person who legally bought or somehow “made” them.
how many were turned in by biological males.
Suspicion: Most were stolen property, many others inherited property (and some stolen, then inherited). Most were turned in by women, left behind, by a dying father, brother, son, or spouse. Others abandoned by a husband, son, or boyfriend that took off, went to prison, just disappeared, etc.
And how many of those women traded them in because they wanted to get rid of the scary guns before they could sneak up and shoot them? Can’t be too careful.