Hello there,
My 280x bit the dust, so I'm in the market for a new GPU. The 11-series (or 20-series) could be still far off, especially the mid-range. I found a used MSI RX 580 Gaming X 4GB for 250€, with 2 years remaining transferable warranty. For comparison, the cheapest decent 6GB 1060 is 100€ more and a 3GB 1060 is 20€ more. It's not a great deal, but I think paying 350€ for 1060 is worse. Yay or nay?