Build an Online Store

need to create a platform for agents to list themselves, with contacts etc , with product images, Also we should be able to offer then an online store on their own domain / our sub domain. 1. Site will have one master store for retail customers to buy the product directly or able to select the agent /dealer from the list . 2 The directory will have worldwide listing so data fields need have international covering city wise.. (like [login to view URL]) 3 listing of trade exhibition has to be shown (like [login to view URL])