I am not saying the Comic Price guide model is dead, I am saying it is on life support. Currently, there are no monthly comic book price guides (think Wizard Magazine) that accurately track prices. The big books come out every year, but they do not capture the prices of books that spike before or after the publication of the book. If a book starts spiking on eBay before the book is published, it will not be captured until the next edition. Basically, if you are looking for newer hot books, the price guide model is dead. If you are looking for older books, it still might not be helpful.