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There are cheap Virtex-6 and Kintex-7 boards as well ~$100-$150 on Aliexpress.

The gotchas with those are that:

1) The boards are very bare-bones. Most of the I/Os are tied up in high-speed connectors like PCIe or SFPs, which will be very difficult for a beginner to work with.

2) The Virtex/Kintex parts they're using require a paid (or pirated) Xilinx license, and the sheer size of the parts makes compile times even slower than normal.

But if you are not beginner some of these boards are really great. Combination of large and fast Kintex-7 FPGA, SO-DIMM, PCIe and Gigabit Ethernet is really cool. For a price of Zybo Z7-10!!! Compile time and tooling is another issue. Naked ZynQ project with ZynQ alone takes few minutes even on decent machine.

1. I/O isn't that bad, 40-100 GPIOs out, pretty much on par with most Artix-7 boards out there, SFP and PCIe is a plus cause Artix chips have no/slow transceivers and simply can't use them, and well everything aside from tutorials aren't beginner thing on FPGAs

2. License is pain though, you can get a proper demo license for Kintex probably

3. Compile times for barebones projects are few times more for a larger FPGAs, but as you add IPs and stuff they take a few minutes on a fastest computer anyway

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