Vendortron

Vendortron is a Protectron manning the Gun Runners kiosk outside of Freeside

Background
Vendortron sells weapons and ammo for the Gun Runners. According to the Vendortron, the kiosk was built around it in order to deter theft and assault. As such, the Vendortron and its stock are invulnerable.

Weapons
The store has five inventory tiers (the inventory is random and may not include all weapons listed below): Finishing the Honest Hearts add-on will also make the .45 Auto pistol, .45 Auto submachine gun, war club, yao guai gauntlet, tomahawk, and fire bomb available for purchase. Similarly, after completing Lonesome Road, rockets and nails will be sold. Sometimes, however, rockets and nails can be purchased before even starting Lonesome Road.
 * Tier 1 (player level 1): silenced .22 pistol, Varmint Rifle, 9mm pistol, .357 Magnum revolver, single shotgun.
 * Tier 2 (player level 1): 10mm pistol, 9mm SMG, cowboy repeater, Service Rifle, caravan shotgun.
 * Tier 3 (player level 6): .44 Magnum revolver, lever-action shotgun, silenced .22 SMG, 10mm SMG, hunting rifle, sawed-off shotgun.
 * Tier 4 (player level 11): trail carbine, hunting revolver, assault carbine, sniper rifle, hunting shotgun, 12.7mm pistol
 * Tier 5 (player level 16): riot shotgun, 12.7mm submachine gun, marksman carbine, minigun, light machine gun, brush gun, Anti-Materiel Rifle.

Weapon mods

 * Vendortron can carry most weapon mods available in the game, even while purchasing with a level 1 character.
 * It will always have all Honest Hearts and Lonesome Road mods once the player finishes the add-ons.

Ammunition

 * If Vendortron sells a gun, it will also have a chance of stocking the appropriate ammunition. If the ammunition appears for purchase, it will be in a large quantity (usually in a stack of 100+ of non-rare ammunition types).

Misc

 * Vendortron sells all of the components needed to make weapon repair kits: duct tape, scrap electronics, scrap metal, wonderglue, and wrenches. It also sells various ammunition crafting components, such as primers, gunpowder, and empty casings, all in bulk containers.

Aid

 * Vendortron never stocks aid items, apart from the occasional weapon repair kit.

Appearances
Vendortron appears only in Fallout: New Vegas.

Behind the scenes
On a terminal inside the Gun Runners factory, it is suggested that the Vendortron's name be changed from Vendortron to an actual name "like Bob. We're not calling it Bob" which is a reference to the 2000 post-apocalyptic science fiction film Titan A.E.

Bugs

 * Several bugs exist related to vendor inventory replenishment and conditions that prevent caps from transferring from a vendor. To prevent the non-transfer of caps from the Vendortron, maintain at least 1000 caps in the player character's inventory after buying items from the Vendortron. The bug seems to only occur once the player has gone below 1000 caps. See the main bugs page for details.
 * If one buys too many raw materials to create ammunition in one transaction (case boxes, primer boxes, jars etc, but not items such as duct tape or turpentine), the game will crash at the inventory window screen. This can also happen just from simply making a large transaction in general. To avoid this, buy a single unit of raw material (be sure to accept the deal), after buying a single unit, the rest may vanish which may cause more problems. Buying all of a single type of item seems to work, and the rest of the items won't vanish.
 * Occasionally, speaking to it will cause it to shrink to about knee length, and after a few minutes returning to normal size.
 * Occasionally after talking to Isaac, then proceeding to barter with Vendortron when Isaac is leaning against the reloading bench, Isaac will clip down through the floor. After traveling and returning to the Gun Runners, he will be inside Vendortron's shack, talking to Vendortron which makes it impossible to barter with it.
 * Isaac's clipping may also happen on the Xbox 360 version of the game (patched 1.4.0.525), but fast traveling undo clipping.
 * Punching the kiosk while facing the Vendortron may turn it hostile. If the player then enters the Gun Runners factory it will appear inside the building along with them and will be hostile. After dealing with Gun Runners personnel and leaving, when returning to the Gun Runners Kiosk (after a few days), Vendortron will no longer be hostile, but may appear standing in front of his kiosk rather than inside it. It will still function in the usual way though.
 * On rare occasions, after speaking/trading with Vendortron, then traveling to New Vegas Medical Clinic, Vendortron will spawn nearby walking back to Gun Runners. A Gun Runner guard may also spawn and walk back as well.