I have a library of over 400 nook books and am very aware of what publishers charge (or rather what booksellers charge) for ebooks.
There is a wonderful selection of free books - mainly classics or new authors, short fiction or the first chapters of a known author's upcoming book (to get you hooked so you buy the book...) and an unfortunately large selection of varied levels of porn. All of these are free or very inexpensive (generally $5.00 or less). Popular authors are beginning to write short stories and charge very little for them, I have noticed. Often they are prequals for series under way. Books which are older and have been out in paperback for quite a while may go for around $8.00. Newly published books are rarely much less that one dollar or so below printed book rate (and in a few instances - actually higher...).
When you factor in the facts that the publisher does not have to pay for paper, printing, binding or delivery... it seems to me that ebooks could be expected to be substantially lower than printed books. That what I was trying to say in my earlier post although not very well, apparently.
I have recently discovered the way to search for free books is to select search results to come back based on "lowest to highest price" in whatever catagory you are interested. Many pages of free books generally come up first.
Free books are plagued with a huge number of typos. Many authors are self-publishing so the quality of writing may be far less than what you would prefer though I have found some pretty good books in this way. You can not go by the number of stars left in reviews to select books because if you read a few, it is obvious that authors are adding their own (or generally paying someone...) to review their books. The use of English is frequently so bad it is hard to figure out the intent of the review.
Those are a few of the ins and outs of buying ebooks from my perspective. I'd be interested in knowing if any of you have very different experiences with buying and the prices of ebooks.