I have a Nordic Track e7 elliptical for sale. It is in pretty good shape. The plastic is cracked on the right mechanism (you can see this in the last photo), but it doesn't prevent it from working, and the plastic isn't broken away. It hasn't been used much at all. My mom had it for awhile, then I got it from her, and I just don't use it enough to justify the room it takes up. It does have a book holder. For a review of this machine, you can check this website: http://www.nordictrackpart.com/elliptical-reviews/nordic-track-e7-ellipse-review/. However, this review notes you can play mp3's on this machine, and I don't recall seeing a port for that.
Please email with any questions, as it is difficult to reach me by phone because I work shift work. Thanks for looking!