I am looking to start a new ecommerce website which is a cross between wish and ebay. This is a big site which will need to have a front end a back end used for order fulfilment and and API which we can use to upload products directly form wholesale companies. online log in through facebook and heavily integrated into facebook. This is very early days in the development and so I am looking at the potential and possibilities of how to achieve this. I have added a word document to give you and idea of the front end (this is basic) .