B&H Photo-Video offers the HP ZR24w 24″ Widescreen LCD Monitor, model no. VM633A8#ABA, for $368. With free shipping, that’s the lowest total price we could find by $9, excluding the price below. However, we saw this item for $18 less after rebate last month (since expired). It features an IPS panel with 1920×1200 native resolution, 1,000:1 contrast ratio, 5ms response time, 400 cd/m² brightness, four USB ports, and DisplayPort, DVI-D, and VGA inputs.
A close price: MacMall has this monitor for $368.99 with free shipping.