Amazon offers the Acer 25" 2560x1440 LED-Backlit LCD Display, model no. G257HU, for $249.99 with free shipping. That's the lowest total price we could find by $30. It features a 2560x1440 native resolution, LED backlight, and VGA, DVI, and HDMI input.
Note that it's expected to ship in three to five weeks.