Staples offers the Dell 27" 1440p Flat IPS LED Ultra-Thin Monitor for $349.99 with free shipping. That's $77 under last month's mention (which included a $100 Dell gift card) and the lowest outright price we've seen. (It's the best deal now by $50.) This 6.9mm-thick monitor features a 2560x1440 native resolution and a USB-C port to charge a laptop.