Here is my walkthrough of the site:
1. Great, exactly what I am looking for: book on designing web applications.
2. Oooh look, Facebook, Freshbooks, and MailChimp use this, wait, no they do not. This is graphically implied by their logos and using an established user experience location, not happy about being tricked.
3. Jump to packages: $200! Good day, sir.
4. Wait, it cannot be that expensive, scroll down some more and find the book. Now I am worried about what I am purchasing as the person trying to sell this does not understand basic concepts of web design, tricked me, and wants a ton of money.
5. Head back to Hacker News to determine if anyone knows who Nathan Barry is and if he is a reputable person.
Place your layout of prices in a pricing, side by side. The scrolling down through the site is not helpful in making me feel better about purchasing a design book when one does not employ basic pricing structure layouts see this site for examples (http://bit.ly/lVPfr4). You could skip to a pricing matrix, then scroll down further to see more of it.
Recognizing that you are trying to present the highest price first to drive higher revenue, you need to reverse the order in the case of a scroll driven price change. Get the user to the first option, the book, then the user will see that there is more content on the page (scroll bar, images / graphics below book option). This teaches the user that there is more below each price mark and you would drive futher sales when a user sees the added benefit for each item.
Another item would be to have a try the book and buy more option later. This could be done in a constant contact format.