I just told her, if I'm gone, cart them down to the gun shop and take whatever he gives you and be done with it.
That's a great way to get a fraction of the value out of them. The last way I would ever try to get money for a gun is to take it to a dealer. They have to give you less than someone else will pay them or they aren't going to make any money on the deal. You may consider finding a trusted and gun savvy person to appoint to a position to liquidate them.