Dell Home, via its Member Purchase Program, offers its Dell 27" 1440p GSync LED-Backlit LCD Gaming Monitor, model no. S2716DGR, for $410.39. Apply coupon code "EXCLUSIVE10" to drop it to $410.39. With free shipping, that's $65 under our January mention and the lowest total price we've seen. (It's the best deal now by $235.) It features a 2560x1440 (1440p) resolution and USB, DisplayPort, and HDMI inputs.
Note: Dell's MPP is available to select groups, including students, government employees, military (active and retired), credit union members, and health care workers.