Dell Small Business offers its Dell OptiPlex 3040 Intel Skylake Core i5 3.2GHz Mini-Tower Desktop PC for $579. Coupon code "$50OFFBIZ" drops it to $529. With free shipping, that's the lowest total price we could find by $30 and the best price we've seen for an Optiplex PC with this CPU. It features an Intel Core i5-6500 3.2GHz Skylake quad-core processor, 4GB RAM, 500GB 7200 rpm hard drive, DVD burner, HDMI, DisplayPort, USB 3.0, media card reader, and Windows 7 Professional 64-bit with a Windows 10 Pro license. Deal ends April 28 at 8 am ET.