Dell Home offers the 4.8-lb. Dell Inspiron 15 3000 Series Intel Pentium 2.16GHz 15.6" Laptop in Black for $299.99 with free shipping. That's the lowest total price we could find, outside of the mention below, by $30. It features an Intel Pentium N3540 2.16GHz quad-core processor, 15.6" 1366x768 LCD, 4GB RAM, 500GB hard drive, 802.11n wireless, Bluetooth 4.0, 4-cell battery, and Windows 8.1 64-bit. (No optical drive is included.)
A close price: Newegg has it for a buck more.