Words are everywhere. They are a currency of our everyday lives. Someone who reads and is intelligent enough to do a little research — can literally teach themselves almost anything with an internet connection.
Personally, if you want to sell an eBook — stop charging $1, give those books away all day, every day — charge $10 or $15. If it’s specialized knowledge, then charge $100 or $1000.
Perception is reality in everything. There just isn’t enough distance between $0 and $1 to make my perception change about something.
If you’re going to write an ebook, then create some distance between $0 and the price.