As we know there are endless lists when trying to buy something. When we dont look around on the items and look for example for ammo, it could be pain in the ass to find it, sometimes its at the end of the list and you dont make it with your barter or because of a thief.
I propose the following suggestion (I think relatively easy to implement):
>when going to a vendor decided to buy something we would have weapons/armors/ammo sorted, let me visualise this
<go to barter press talk>
"What can I do for you?" (dunno the text srry

)
"Show me what you got"
"What would you like to see?"
[HERE a list opens]
-show me everything
-small guns
- big guns
- armor
- ammo
- miscellanous
You press the category of the item you want to see or everything. Once pressed the specific category you see all the items belonging to the group. This way people against this shop burden and also against vendor auto repair would be happy. WHAT DO YA SAY?