Vendor

is a specific NPC type that sell NPC items to the Avatar.

There are three specific categories of :
 * Player Vendor - These are NPCs that can sell all sellable items in the game. These NPCs are owned and managed by players.
 * Public Vendor - These are NPCs that can sell all sellable items in the game. These NPCs are part of the Game.
 * Merchant Vendor - These are NPCs only sell NPC items in the game. These NPCs are part of the Game.