Kindles are widely considered to be sold at or below cost with the money maker being digital sales.
I never said whether, in 2010, Kindle was being sold at a profit, or not. It is simply a factor in total cost of ownership. Instead of paying for contents, paper, and ink in a single transaction, the ebook customer is expected to pay separately for media and "paper and ink." How many books will you read on that $399 (or $199) Kindle before it hits the recycle bin? When you know that, you know whether the lower cost of media has offset the separate cost of "paper and ink." And at that time, the only media being consumed on a Kindle was books, in 16-shades-of-gray. Photos looked awful, and color illustrations... forget about it!
At the time this was taking place, Amazon was selling the media below cost. They were also paying the cellular data providers (no wifi in early Kindles). If they were also selling the Kindles below cost (which, at $399 with no middleman, isn't likely, but possible...)... The near-term goal was not "sales of digital media." The goal would have had to be "to create a hardware-specific, proprietary market for ebooks."
If media sales was the goal (and long term, that's a logical goal), Amazon had to envision a future where they were no longer selling that media below cost. How, exactly, would they do that? They could either pay less for the media (which is what the publishers expected), or raise prices to the consumer.
The success of iPad (and phablets) killed that original vision for Kindle. Multi-purpose computing devices have clearly won, and Amazon can't afford to limit their customers to a particular hardware platform. They could well be selling Kindles at a loss in this environment - it's not just about selling media, it's about selling groceries, appliances, jewelry... Do you see Google when you power up, or Amazon?
About the "natural price", I never implied the previous price was "natural": what the previous price was is irrelevant. The point is that the price (whatever it was) was increased through horizontal price fixing, which is illegal no matter what. In this sense the increase was "artificial": it was not obtained through the rules of the free market but by engaging in illegal anti-competitive practices.
You can argue that the previous price itself was also not obtained through the rules of the free market, but first of all Amazon itself was never sued nor found guilty of any anti-competitive behaviour and on top of that it would in any case not excuse the publishers for their price fixing.
My point has nothing to do with the merits of the price-fixing case. The verdict is what it is, the plea deals are what they are. Your original comment was specifically, "...so that the perceived value of books would remain artificially high." I took that to mean
all books, including print books. How could it be otherwise? (That was one of the publishers' concerns - grossly undervaluing content, grossly over-valuing the contribution paper and ink make to the cost of a book.) So... how do publishers keep the value of all books "artificially" high? (You needn't respond - since the publishers weren't accused or found guilty of fixing the prices of print books, it's "irrelevant.")