David Kravets & Roberto Baldwin, reporting for Wired:
The company’s terms of service on the limited-edition wearable computer specifically states, “you may not resell, loan, transfer, or give your device to any other person. If you resell, loan, transfer, or give your device to any other person without Google’s authorization, Google reserves the right to deactivate the device, and neither you nor the unauthorized person using the device will be entitled to any refund, product support, or product warranty.”
Pretty sure the first-sale doctrine protects anybody wanting to sell the device itself. But, I imagine Google is well within their rights to not provide service to a resold device. And as with the restrictions for app developers, this is likely to change when Glass is available to the general public.