Toshiba SD-P1400 7-Inch Portable DVD Player
Inexpensive, but you get what you pay for
I was swayed by the cheap price, but regretted it soon after.  The player is bulky, unattractive, has cheap membrane buttons, worst of all, was skipping frequently or would not load some of my DVDs altogether.  On top of it, the flimsy plastic notch intended to keep the battery attached broke off after a while.  I've now bought a more expensive Panasonic LS50, which is smaller, better built, and so far has worked out great.