I am not sure what you are asking, that being I am first an artist and then a muddling web person, LOL. But for my website I am using a highly modified (at least for the visual design) for of zen Cart. It's an open source web store design. The payment module connected to it is paypal. The interface with a module for that and it's pretty easy to integrate.  Hope that helps. Please feel free to ask more,; I love to help.