Dell Small Business offers its Dell OptiPlex 7040 Intel Skylake Core i5 3.2GHz Mini Tower Desktop PC (no monitor) for $819. Coupon codes "SAVE35" and "EXTRA$100" stack to cut it to $660.50. With free shipping, that's tied with our mention from three weeks ago and the lowest total price we've seen. (It's a current best by $17.) It features an Intel Core i5-6500 Skylake 3.2GHz quad-core processor, 4GB RAM, 500GB 7200 rpm hard drive, DVD burner, USB 3.0, HDMI, and Windows 7 Professional 64-bit with a Windows 10 Pro license. Deal ends May 31.