His cost is $71.50 w/ shipping for adapter + cables and the Gigampz cost shipped is $55.99.
How do you figure? Worst case, single board and 4 cables shipped would be $68.50 (if we don't put it in a smaller box, which we can do for single sales and save a few bucks)
If you buy, say, 10 sets, discounts bring that to $55.20 per unit, shipped, maximum. With enough quantity I can source full kits (including the PSU) for $65 or less shipped.
Shipping is only that high because we actually pack stuff well instead of chucking it in a padded envelope where it'll get crushed and destroyed, and then send Priority Mail so you have it in 3 days max.
The main part of the board that you really need to worry about sustaining damage is the power switch, which we considered a necessary feature. We also have 3.3V and 5V aux power and the ability to measure/monitor your output current, in addition to the ability to turn on remotely (with an active-high signal, a bit safer than active-low) and an "is my supply on" pin. Also you get to buy stuff you know was made and fully tested by actual human Americans. Our cables, while a bit shorter, are also heavier wire. We could make our stuff cheaper, but it would require not making it as good.
