Lenovo offers the Lenovo ThinkCentre M73 Core i3 2.9GHz Desktop, model no. 10AYCTO1WW, for $623.99. Coupon code "USPM73T40925" drops it to $567.99. With free shipping, that's $56 off list and the lowest total price we could find, although we saw it for $13 less last week (since expired). It features an Intel Core i3-4130T 2.9GHz Haswell dual-core processor, 4GB RAM, 500GB hard drive, Gigabit Ethernet, and Windows 7 Professional 64-bit. Deal ends October 1.