Hypothetically speaking I'm pretty sure that if you made a facebook store, and then went on to advertise it here, you'd get your threads shut down fairly quickly for breeching the forums no advertising policy.
Secondly to answer your question: No I wouldn't. I don't purchase magic online much at all simply because I try to support my local brick and mortar store, unless it's an item that I know I can only get through an online source. Secondly, I don't know you, and I have no reason to trust you. So until you establish a reputation, I'd be very cautious of buying something from you, that I could say purchase from my local magic dealer.
Get a store going, don't advertise it here, and build up a reputation first, and then we'll talk.