Because credit card or paypal payment offers buyers some protection if something goes wrong with the purchase. If VMC had a better reputation, this wouldn't be an issue. I have no problem sending Bitmain BTC because they have a good reputation and I'm reasonably certain they won't screw me.

If I order from VMC, I'm not reasonably certain that you will deliver a working product in a timely fashion. Based on horror stories in this forum, if I receive a DOA product I'm S.O.L.. If VMC had a better reputation, or if you offered buyers payment options with buyer protection, these gold rush boards would be selling like hotcakes at $849 for 750GH.

The reason you haven't sold out yet is because buyers are apprehensive about ordering from you.