Dell Small Business offers the Dell OptiPlex 3020 Intel Haswell Core i5 3.2GHz Mini Tower Desktop PC (no monitor) for $579. Coupon code "R0JG96ZQ0F8BCL" cuts it to $529. With free shipping, that's $60 under our mention from two days ago and the lowest total price we've seen for this model. (It's also $441 off list.) It features an Intel Core i5-4570 3.2GHz Haswell quad-core processor, 4GB RAM, 500GB 7200 rpm hard drive, DVD burner, and Windows 7 Professional 64-bit (plus a Windows 8 Pro license). Deal ends September 22 at 8 am ET.