For one, you can't sell guns over the net without first shipping to a licensed FFL Dealer (Federal Firearms License).
An obvious one is to try listing them on web-sites like these. They don't cost anything, and most will be honest what they are worth, and if not there are several that will give you a good idea.
For example, that '94 Winchester was selling for around $300.00 new.
Take pictures, and post.
I imagine that there are some gunsmiths around your area that will also give you good advice on what they are worth.
For one, if your FIL Loved his guns, and took very good care of them, don't let his Misses "Give them away" to strangers....help to get a good price. I was just talking today with a friend about when us "Men" die, our wives/children practicaly give/throw our stuff away...sad, sad, sad.
One Good Reason to Give them away before you DIE!
An old guy told me onece, "If your gonna give a gun away, DO IT NOW, what the hell are you waiting for?" Good advice if you ask me....