Amazon offers the Dell UltraSharp U2713HM 27" LED-Backlit IPS LCD Monitor, model no. CVN85, for $649.99 with free shipping. That's tied with our mention from three weeks ago and the lowest total price we could find by $80, outside of the mention below. Features include a native resolution of 2560x1440, LED backlight, 4-port USB 3.0 hub, and DisplayPort, HDMI, DVI, and VGA inputs.

Of note, Costco offers it to its members for the same price.