Can I have a multisite marketplace that doesn't have individual stores?

I am trying to setup a marketplace for listing digital products that people can upload and sell. However, as I explore things it seems that each person has to make a “store front” and if you click on a persons product from the main domain store it will lead you into their store and then you are stuck just looking at their products. Is it possible (without a massive amount of custom coding) to have the site be one main store with sellers being able to list items?

My plan is to use multisite and marketpress.