Well, the price on the cheapest version of the Kintex 325 is north of $500 in small quantities... but in high volume, much much lower. I daren't say how low. And for those wanting an engineering sample of the XC7V2000T, my answer is "Sure!". As long as you work for Cisco! Tier 1 customers will get whatever they want!
Seriously, the XC7V2000T is not a cost effective part for bitcoin mining. It's really targeted for ASIC emulation.
Data sheets & user guides for the Kintex are all on the xilinx.com website. There is a PCIe demo board for the Kintex 325 (KC705), but it won't be publicly available for a few more months.
regards to all,
XG