There are some people in those comments who are not clear on how capitalism works. I'm not saying you have to like it, I certainly don't, but raising the price on more sought-after items until they have a sustainable number of buyers is pretty basic supply-and-demand.
Unrelated to the topic, am I the only one who's bothered by how Rosewater's blog has no styling to distinguish the question from the answer? I realize that I'm a web developer picking on someone who isn't, but it's been like this for years and I can't believe he hasn't worked out a solution by now.