Here's a great example of market forces at work. The Dreamcast was abandoned as a hardware platform by its' creator, Sega, and reduced for quick sale. The price was reduced to $50, which makes it affordable to almost anyone, and especially to those who wanted to buy one to fool around with the Linux possibilities.
So, lots of Linux users run out to buy one, and then start to tinker around with the BSD distro available for the system. Well, as luck would NOT have it, the broadband converter for the Dreamcast is no longer in production. Thus they sell for twice the amount of the actual system on Ebay.
Scarcity breeds high prices when volume of market is created by low prices. Perfect!