Amazon offers the Acer 27" S277HK 4K Ultra HD IPS LED-Backlit LCD Monitor
, model no. UM.HS7AA.001, for $409.99
with free shipping
. That's $40 under our May mention, the best we've seen for this monitor new, and the lowest total price we could find by $61. It features a 3840x2160 (4K) native resolution, LED backlight, built-in speakers, and HDMI, DVI, and DisplayPort inputs.