Initial IDM-9520 Portable DVD Player with 4-Inch LCD and Car Kit
If it sounds too good to be true, then it probibly is.
The audio/video quality on this little guy is great.  However, here's where Initial Technologies rips you off.  The disk mechanism only lasts for two days.  Save up for a Sony, Tashiba, Philips, JVC, or Panasonic.  RCAs only last for a few months.  They also have great audio/vidio quality, but very poor disk mechanisms.  Note that amazon.com currently does not stock portable DVD players by Sony, Philips, or JVC.  I don't remember seeing many Tashiba portable DVD players either.  Amazon.com does have a good selection in many other catagories, but not portable DVD players.