$499 gets you a refurbished HP 2710p with one-year warranty. That's without a CD/DVD drive. And there are no hardware buttons on the 2710p for page forwarding--you'd need to use the pen or some attached trackball when reading while lying on your sofa. The newer 2730p has the needed hardware buttons. If you're reading a lot of technical PDFs that you want to mark up, you'd need the pen in hand anyway, and a PDF markup program like PDF Annotator, or a new
Evernote/Foxit competitor.