Dell Small Business offers its Dell Vostro 3900 Intel Haswell Core i3 3.7GHz Mini Tower Desktop PC (no monitor) for $399. Coupon code "VOSTRODEAL" cuts it to $349. With free shipping, that's $335 off and the lowest total price we could find. (For further comparison, we saw it with a Windows 8.1 Pro license for $50 less in November.) It features an Intel Core i3-4170 3.7GHz Haswell dual-core processor, 4GB RAM, 500GB 7200 hard drive, DVD burner, Gigabit Ethernet, HDMI, USB 3.0, and Windows 7 Professional 64-bit with a Windows 10 Pro license. Deal ends July 30.