Monoprice offers its Monoprice 27" 4K ActiveHDR LED-Backlit LCD Ultra HD Monitor for $249.99 with free shipping. That's the lowest price we could find by $70 and the best price we've seen for any 4K 27" display with HDR. Features include a 3840x2160 (2160p, 4K) native resolution, HDR, two DisplayPort inputs, and two HDMI inputs.