How can I use facebook to contraol online sale?

Tweet

I have a Facebook account that have so many friends and I also have a group that has about a thousand members. I don't have a website but a virtual store online where clients can purchase stuff with a credit card. How can I get an application(store) that will easily help clients process purchase good and complete transactions without going to the virtual store. Or if even he want to go to the virtual store it will only be to complete payment and delivery information. I hope you understand my request? Show me what I can do. Thanks my mylot friends...