Not counting my first gun that was given to me, I bought my first gun at 18. Now I'm 51. I have every gun I ever bought as well as my Dad's guns. I have some guns I don't like as well as others, but 've never bought a gun I absolutely hated. If I did I might sell it. I do a lot of reading about a gun that I am interested in buying, make an informed decision, and lust after it for awhile before buying it. So, I generally know what I'm doing. Given that, I think selling guns is generally a bad idea.
RJ