So the retail cost of the motherboard is $1689.56.
I'm not sure of the quantities involved here but I imagine they're not huge.
How much time has spent developing and testing this board? How many 'one off' test samples needed to be made before the final revision? How many man hours were spent on this? This wasn't a hobby project like Natami - this is real companies that need to pay salaries.
This isn't a criticism aimed at B00tDisk (I just quoted his post) but seriously, if you want custom hardware that isn't aimed at the mass market - you pay the price.
All credit to Trevor for investing and believing in this; the prices are what they are. *shrug*
Steve