Jet.com offers the Acer G257HU 25" 2560x1440 LED-Backlit IPS LCD Monitor, model no. UM.KG7AA.002, for $242.99 with free shipping. (Amazon charges the same.) That's the lowest total price we could find by $20 (outside of the mention below), although we saw it for $43 less last November. It features a 2560x1440 native resolution, LED backlight, and HDMI, DVI, and VGA input. Deal ends October 20. Note that you can also receive additional discounts during checkout by waiving free returns or by choosing select payment options.
A close price: Newegg charges $242.99 plus 99 cents for shipping via coupon code "EMCFEFT28".