This isnt really the way to go.
A) 8 page e-book isn`t probably worth much. E-books were cool few years ago, today the market is full of them. I`d suggest giving this one "free" in exchange for email address.
B) If you don`t know where to sell it, how do you expect to sell any? What kind of expert does not know where his or her target audience is?
Sorry to be so harsh, but sooner you realize this, sooner you can start doing some proper work.
C) Generally speaking, producing first and shipping second could be a waste of time, as you can soon find out there is noone interested in your ebook. Try it the other way around.