It would be very interesting to know what will be the cost of video cards rx580 by piece and if purchased wholesale. Could you then unsubscribe as you will know... 
I can buy these for 530 EUR. But, I wnat to know what I can mine with it? Can I mine multiple curencies or ETH only and also I want to know amount of Mhs? 6 GPU rig is going to cost me around 3.5K EUR... Thanks!