Bit harsh guys, ok normal A4Kd's in the UK are selling for about £500 at the moment (although I saw an A4K keyboard go for £155 on its own last week).
As an electronics engineer myself the interesting bit has to be the PCB software. Worth the extra £500? hmm dunno.
The software is interesting though. (specially the plotting software, would be cool to try that with my Bungard CCD)
Anyway how much its worth is anyones guess. He can always reduce it next time round. Just hope whoever gets it doesnt format that harddrive.