I own a few guns. Lets just say, more than 10...

I like them. I buy all kinds, just because. Some are cheap. Some are not.
But, I guess I have a fair amount tied up in them. If I died, I could not expect my son to keep all (uh, I think it was 'ten' ), of them? If I left him a house, would I insist he live in it?
I would expect him to liquidate most of them. Some people have stocks and shares, I have metal and wood. Polymer too.
Now, all that said, if we are talking about one gun, and I believe the OP was talking about the one gun that the dad passed on, well that is different.
Have a Winchester 94 and a Browning BPR-22 in 22 mag (apparently pretty rare in 22 mag) from my father-in-law. Not ever selling those.
Now, (really my last point!), if my family needed to eat, pretty sure my father-in-law would rather I sell it and take care of what I need to take care of than keep it.