This post about de-cluttering one's photographic gear resonated, especially since I'm in the process of paring down a couple decades' accumulation of old military rifles for very similar reasons. I don't shoot them and, in fact, I don't really have them stored in the sort of accessible fashion that allows me to really get them out and appreciate them, so I reckon it's time to get them back out into the marketplace and let them find homes where they will be loved appropriately.
In general, however, I don't really have a problem drawing a distinction between "using" guns and "collecting" guns. The former tend to need to justify their keep and I have minimal attachment to them as objects, while the latter don't have to be objectively useful to be appreciated. I give you exhibit A: