It can depend in what type of guns they are and their approximate value.
If they're flintlocks or percussion, long rifles or carbines, modern reproductions or antiques etc...
Are there any gun classified websites that cover Texas?
Are you willing to ship them?
Are there any reputable gun shops in your area that sell on consignment?
Nearly every state has an antique arms association with members who are dealers of antique guns, and many sell at gun shows.
One or more of them may be interested in buying some of the guns if you can contact the association and obtain the names of area antique gun dealers.
They often operate out of their house and travel to shows with the guns that they want to sell.
And they may also know people in the association who deal with certain types of guns.
There's also Gunbroker which is an online auction house that allows the public to sell their guns directly for a small fee.
Many gun shops that sell on consignment use Gunbroker to sell guns for people, and they handle the shipping and the fees, and will charge a commission.
Another outfit is Track of the Wolf which is one of the nation's largest muzzle loader parts suppliers located in Minnesota.
People send their guns to them which they will sell on consignment.
But they usually need to be in very nice condition inside and out or it could be a waste of time since they do accept returns.
So without any other information than what you've provided, it's difficult to mention any other ways to sell the guns.
It not very hard to do some of the Google searches to locate contacts, but we don't know any details about you have or your locale.
Here's the website for the Texas Gun Collectors Association. --->>>
https://tgca.org
They're having a show and auction on April 23-25, 2021 --->>>
https://www.reddit.com/r/Antique_We...exas_gun_collectors_association_gun_show_and/
Houston Gun Collectors Association --->>>
http://www.hgca.org
Pioneer Gun Collectors Association - Amarillo --->>>
https://web.amarillo-chamber.org/Non-Profit-Organization/Pioneer-Gun-Collectors-Association-8006
There are probably more associations, and the more folks that you talk to in your region the better.
You need to have someone at least look at the guns to help determine their value and saleability.
Some folks who have gun collections will rent a table at a gun show and try to sell the guns themselves.