Amazon offers the Dell UltraSharp U2415 24" IPS LED-Backlit LCD Monitor for $239.99 with free shipping. (Newegg charges a buck more.) That's the lowest total price we could find by $30, although we saw it for $46 less after factoring in a gift card in February. It features a 1920x1200 native resolution, LED backlight, 16:10 ratio, USB 3.0 hub, and DisplayPort, mini DisplayPort, and two HDMI inputs.

Update: The Amazon offer has increased in price; however, the Newegg item is still available for $239.99 with 99 cents shipping.