Groupon offers the 5.4-lb. Lenovo ThinkPad E540 Intel Haswell Core i3 2.4GHz 15.6" Laptop, model no. 20C6-00AAUS, for $419.99 with free shipping. That's the lowest total price we could find by $20. Features include an Intel Core i3-4000M 2.4GHz Haswell dual-core processor, 15.6" 1366x768 LCD, 4GB RAM, 500GB 7200 rpm hard drive, 802.11n wireless, Bluetooth 4.0, USB 3.0, HDMI, and Windows 8.