Examples Of Online Retailors

Asos has a sale and buy section of there website, is this almost a contemporary take on a bring and buy sale? Still it is effective and highlights another way to purchase individual items. Could I mirror this on a social website such a facebook? Exchange of images? or Objects?

Topshop has a vintage section in store but it also shows its links to twitter and facebook on the website. This maximises communication to the customer, keeps them up to date with new lines. Communication with customsers is developing fast via facebook, customers can follow new photos shoot posts.

Is this something I could develop the communication element of facebook?