I find it interesting that it was mentioned the book was on the rise. I haven't paid much attention to the last year sales, but I noticed the book had actually gone down on a few of comiclink's auctions in the 9.2 and 9.4 range in the past 2 years. Of course, they don't report to GPA. I've never "needed" to have the book because it is a parody and frankly, the cover doesn't do anything for me. As mentioned the story blows, too.
Don't get me wrong, I'd buy the right copy if the price is right, but no infatuation for it like 227, 232 and 251.