I sell frequently. Get rid of stuff that isn't getting shot and acquire cash for the ever-evolving wish list.
Off the top of my head I've unloaded two Beretta 92s, a 1911, two modern, Savage bolt action deer rifles, and a Winchester 1300 riot gun that I personally owned. I am the only one in the family with a large safe so I have also unloaded a Savage 99, Winchester 94 and Remington 760. With prices the way they are now it just makes sense to get rid of stuff that's just taking up room or not getting used for whatever reason.
I also ran through the ammo locker and sold about $250 worth of unopened boxes of ammo that I had no plans on shooting. Biggest impediment for me has been Facebook's gun ban. We had a local FB page that was essentially a gun market. It was a great resource in hindsight and I really, really mis it.