ANTOnline offers the Lenovo ThinkCentre M83 Intel Haswell Core i5 Quad 3.2GHz Desktop PC, model no. 10AL0009US, for $639.88 with free shipping. That's a $10 drop since our mention from May and the lowest total price we could find by $9. It features an Intel Core i5-4570 Haswell 3.2GHz quad-core processor, 4GB RAM, 500GB hard drive, DVD burner, Gigabit Ethernet, and Windows 7 Professional 64-bit.