I can get these cards for 400 EUR. ASUS Radeon RX 570 Expedition OC edition 4GB GDDR5 256bit - EX-RX570-O4G AMD Radeon RX 570, 4GB, GDDR5, PCI Express 3.0
I want to build four 6GPU rigs. Any kind of info. can help, thanks!
At those prices I don´t think you will make a good deal frankly. Ethereum difficulty is too high at the moment even with decent cards like those it may go PoS before you get Pay Back.