Gateway NV55S04u 15.6" Laptop for $425.00 shipped.  Here is a screenshot for your reference.  It features a AMD quad-core A6-3400M Accelerated Processor with Radeon HD 6520G, 15.6" LED-backlit LCD at 1366 x 768 resolution, Gigabit Ethernet, dual-layer DVD burner, wireless-N network connectivity, 6-cell lithium-ion battery and more.  Most places have this Gateway laptop with quad-core CPU for about $499.