If you are interested in FPGA PCIe or PCI cards there are also a lot of Gidel boards available second hand. ProcSpark/ProcStar etc. The official software is proprietary and they often contain multiple FPGA devices so there is again an exercise working out the pinouts etc if you want to simply use them with Quartus. I got one with a massive Stratix IV on.
A Kintel UltraScale+ is quite a prize though, really nice write up.
A Kintel UltraScale+ is quite a prize though, really nice write up.