Hines's ebooks are priced at $6.99. That's too much, and for the past 20 months my numbers bear this out. I'll sell 150 copies a month of a $7 ebook, and 1500 of a $2.99 ebook.

If his published priced them at $2.99, they'd sell more than 4% overall, and make up a much larger percentage of his royalty check.