This is a wee little mod if you want to sell your stuff and would rather not have to go from vendor to vendor trying to sell your inventory, as well as using mods that alter vanilla stuffs. There's a script that refreshes the inventory once a day, and if there are any issues with that, please let me know. :)

Locations
Goodsprings, Primm, Novac, 188 Trading Post, Mojave Outpost, Freeside, Westside, New Vegas Strip, Camp McCarran, Cottonwood Cove, and Sloan

You can do as you wish with this file. Though credit would be appreciated generally.