I'm glad books aren't priced like that - I would not be able to afford half the books I read :(

I think there's also a lot to be said in regards to how much value a reader has, too. As in, if there are more readers, will it make me, the author, more "rich" in other ways too (popularity, Twitter followers, etc.) so that when the next ebook comes along I already have thousands of people interested in buying my book that didn't exist before. A low price tag increases readers, which I think have huge individual values in themselves.

Now, if the book is extremely niche ... almost ridiculously so ... then a $3000 book probably would be okay, but in general I think this isn't going to happen too often.