You seem to have mistaken 'quids' for 'bucks'. £50 is $100.
However the component costs have to be taken into consideration - the FPGA, the 68k, the RAM, the ports, the resistors and capacitors, ...
The boards could be assembled in China however in proper ovens - and if you're doing that, then why not switch to a PGA FPGA? However I'm willing to wait for such a "version 2", and just want a version 1.1, fully assembled, for around £75. After that it is just time to get the woodworking skills developed and make a nice pretty case.
And the system would make a damn neat FPGA programming platform, besides being a MiniMig. Who's going to write the first demo in Verilog + 68k?