This is barely used basically brand new SQRL acorn CLE-215+ with a Artix 7 XC7A200T FPGA on board
  
  • Xilinx FPGA
  • Onboard DDR3 with 1.6GB/s bandwidth
  • Onboard configuration flash (S25FL series)
  • PCIe x4 gen 2 interface to FGPA (2GB/s)
  • IO: 4x LVDS pairs and 4 general purpose
  • 4 user controlled LEDs
  • External I/O via I/O connector: 12 Total, 4 selectable analog or digital
  • External I/O via PCIe connector: 1x 3.3V digital I/O (LED), SMBus
  • 10W VCCINT supply
  • Dimensions: 22x80x28mm

is the same as the Nitefury II from RHSResearchLLC has a github which has lots of detail and handy stuff to get started with this device. There are other projects also that have used the acorn just need to search google not hard to find. This is a great product for those who what to play with a Xilinx FPGA as this chip is Free to develop with using Vivado no need for a expensive license. 

There is a discussion regarding this device on EVVblog named "sqrl-acorn-as-an-interesting-artix-7-board" google it if you want to read more about this fpga. 

such a cool little fpga would be perfect for your learning experience can be installed in a pc with a M.2 2280 size slot. 

also please note that you will need to have your own external jtag adapter to connect and load bitstreams to the FPGA, Digilent HS2/HS3 + pico-ezmate 6 connector cable , I can send a pic of what I have. or a different method search AcornXJTAG in the web for another solution. 

Thanks for looking