If you have used Code Canyon and Theme Forest, then you maybe interested in setting up your own marketplace. Unlike e-commerce where you need to source products, buy in bulk and then find customers to buy. You could think of approaching it the Etsy or Amazon way.
Setup a market place where others can use your site to sell their creative work.
Clone Forest sell a number of high quality scripts that allow you to setup an online market place to sell code, images, video and docs.
Your sellers pay a selling fee which you collect via paypal and you concentrate on just marketing your site.