Adorama via eBay offers the 6-lb. Acer Aspire E5-571P-36LU Intel Core i3 1.8GHz 15.6" Touchscreen Laptop, model no. NX.MMSAA.008, for $399.99 with free shipping. That's the lowest total price we could find by $80. It features an Intel Core i3-4030 1.8GHz Haswell dual-core processor, 15.6" 1366x768 LED-backlit touchscreen LCD, 4GB RAM, 500GB hard drive, 802.11n wireless, Bluetooth, USB 3.0, HDMI, webcam, media card reader, and Windows 8.1 64-bit.

Update: Specs corrected; it doesn't come with an optical drive.