i managed to get 32 570's from alternate.ch ..they lasted about 5mins on their site. i had been searching all of europe for a week with no luck untill then,they arrived today 
Do you think it's worth to buy 1 RX 580? They are at 300eur
at that price not so much, with that price you can add something and get the 1070 second hand, or even new, maybe not the best cooling model solution, but you have something with the same price that earn you more and is more efficient