I don't see how anyone could sell their great, great grandfather's truck, gun or anything else for that matter.
I would give my err..., yeah you know..., to have something like that from my ancestors.
Everything doesn't have the same emotional ties to one person it does to another . I have bought really nice guns from the kids and grand kids of people who had no interest in guns, same for vintage camping gear and knives .
I do not know the whole story behind those divestitures , did they get along with the elder who passed , etc ? Too many factors in those decisions. I bought a really nice Model 70 in 270 from a guy who wanted an AR he ineritied the hunting rifle and couldn't afford an AR so he sold it.