Smartphones selling for $600 is kind of baloney when you realize that they sell cellularless PMPs based on said smartphones for a fraction of the cost.
Not to mention Nexus 5 is $350 and is a pretty high-end smartphone.
That's the price they sell for, or at least when they were the
hot new item.
My point was that early adopters will spend a good bit of money. I think even the early consumer PCs for the 70s and 80s did not even come with storage media options and other goodies. Those were extra.