Lenovo IdeaCentre K320, Core i5 Quad 2.66GHz / 4GB / 640GB for $599.20 shipped after coupon code USPK320628. Make sure there is no extra space before and after the code in order for it to work. Here is a screenshot for your reference. It comes with an Intel Core i5 quad-core 2.66GHz CPU with Turbo Boost to 3.2GHz, 4GB RAM, 640GB hard drive, DVD burner, Nvidia GeForce G310, Windows 7 Home Premium 64-bit, and more.
Originally posted earlier, this is just a friendly reminder.