Same here, but I considered part of the purchase price to be a thanks for the many useful blog posts and, as a result, am very happy with my purchase. Thanks, Dave!
Pricing is hard :/ Price too low, and people don't take it seriously. (e.g. $9 for 35 hours of video). Price too high and people run away. It was my first product, too. I looked at it as, "how many hours would this save someone?" Filtering through bad tutorials, just-in-time googling, all that stuff. Of course with front end there are a billion other learning resources out there, lots free, lots cheap. Hopefully the book is a more direct path than some of those others. Always room for improvement and experimentation of course :)