Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Too expensive

I think as a concept this is an awesome product. So long as Amazon makes all books available in this format and we don't end up in itunes like wars with NBC where they pull content.Why aren't I buying one? Price. 400 bucks is nuts. I'd have paid a buck more per book. 400 bucks is just too expensive. 100 bucks would be my trigger point.