I don't disagree entirely; when you think about it as a phone, it is expensive. When you look at it from the perspective of an ultra-portable computer with a 6" touchscreen and 10+ hours of battery life that can connect to Wifi and Cellular networks, it sounds less outrageous.
Also, with the rate of change being so fast, in 18 months to 2 years, it will be worth 40% or less of its current value.
Valid point, and I'll surely be interested in a used N6 in a year or so.