Ending today, Lenovo offers its Lenovo IdeaCentre K450 Intel Haswell Core i5 3GHz Desktop PC (no monitor), model no. 57314031, for $799. Coupon code "7DAYDEALS" cuts it to $649. With free shipping, that's $150 off and tied with our mention from last week as the lowest total price we've seen for this system with a Core i5 Haswell CPU. Features include an Intel Core i5-4430 3GHz Haswell quad-core processor, 8GB RAM, 2TB 7200 rpm hard drive, DVD burner, 802.11n wireless, and Windows 8 64-bit.