Did you just have "enough" in that you can't be bothered to follow the legal process for selling a firearm, or like many of us, are you just getting long in the tooth, and even though you still appreciate those firearms, know you won't be doing much with them, other than pulling them out of the safe a few times per year to make sure rust hasn't appeared or just for nostalgic purposes?
I've been selling off most of the rifles I collected over the years simply because I'm no longer using them or enjoying them as much as I once did.
I have a Stepson and Grandson who both love firearms, but not in the same way I do and they aren't interested in the same way either.
So, I give them the pieces they appreciate and sell off the rest. Never once do I tell them what the firearms are worth, neither the ones I give them nor the others I sell. That shouldn't be part of the process.
Many people here don't have anyone close to them to pass the firearms on to for safekeeping and use, until it's someone else's turn, etc.
In such cases the best thing you can do for your loved ones is to sell off those pieces to others who will appreciate them.
I seldom buy from an auction house because the cost is often far in excess of what I deem to be fair value. Mind you there is the very odd one worth the extra cost.
I'm much harder to convince and please when it comes to firearms at this stage of my life.
It happens to all of us, some sooner than others.