You are failing to learn the lessons of previous industry impacted by the new digital life.
People want to pay less, not more then the non digital equivalent.
I can get a song for 99 cents and listen to it with equal enjoyment many, many time. Almost all books don't warrant a separate reading.
A book is often a bigger endeavor, so I will pay up to 5 dollars for an eBook. In my case it's the kindle but that applies to future readers as well.
Five Dollars, Max.
Don't forget who you are competing with. It's not eBooks v paper books. It's you're current business model vs Used books, libraries and, yes, copyright infringer.