Amazon is quietly eliminating list prices. That according to a
New York Times article dated last Sunday and published yesterday. According to the article, Amazon is and will be showing one price, we can take it or leave it.
Amazon is doing this, in part, because of dozens of lawsuits by consumers related to discounting practices.
I haven't noticed this change yet with regards to ebooks, or anything else for that matter, at Amazon, but it seems that we will be seeing the change soon if we haven't already.
You can read the article--a very interesting one--
here, on The New York Times' website.