Lenovo offers its 5.7-lb. Lenovo G510 Intel Haswell Core i7 2.4GHz 15.6" Laptop, model no. 59402507, for $549 with free shipping. That's tied with last week's mention as the lowest total price we've seen for this model. (It's also a current low by $151.) It features an Intel Core i7-4700MQ 2.4GHz Haswell quad-core processor, 15.6" 1366x768 LCD, 8GB RAM, 1TB hard drive, DVD burner, 802.11n wireless, Bluetooth 4.0, webcam, 4-cell battery, and Windows 8.1 64-bit. Deal ends March 6.