An online shop using locations and payments.

For example a website which shop owners can go onto and enter their postcode, distance they can deliver to (from the shops locations). Then a shopper is able to go onto the site, enter their postcode and be presented with a list of all stores operating in their area. The website will also be able to receive payments and make payments after removing a percentage of the initial payment. I know it sounds wierd in my explaining this is becuase i dont want to give my idea away over the internet. i have given the main details the website will require and will explain the actaul purpose in person. I will also discuss pricing at this time too. Thanks Adam Cieslak-Jones