CowBoom offers the used Insignia 10" Portable DVD Player, model no. NS-P10DVD11, for $24.99 with free shipping. That's $10 under our September mention and the lowest total price we've ever seen for a 10" portable DVD player. (It's also $115 under the best we could find for a new one.) Sales tax is added where applicable. It features up to 4-hour use per charge, two headphone jacks, 10" LCD, and more.
Note that no warranty information is provided; This used unit may be missing parts or accessories and have dents or scratches.