Amazon.com: Dell Optiplex 390 Desktop PC - Intel Core i3-2120 3.3GHz 8GB 1.0TB DVDRW Windows 10 Pro (Renewed) : Electronics
Amazon.com: Dell Optiplex 390 Business High Performance SFF Desktop Computer PC (Intel Quad-Core i5-2400 up to 3.4GHz, 8GB DDR3, 1TB HDD, HDMI, DVD, Windows 10 Pro 64-bit) (Renewed) : Electronics
Solved: 390, CPU upgrade - Dell Community
Amazon.com: Dell Optiplex 390 SFF Desktop - Intel Core i5-2400 3.1GHz 4GB 250GB DVDRW Windows 10 Professional (Renewed) : Electronics
Restored Dell Optiplex 390-SFF WA1-0327 Desktop PC with Intel Core i7-2600S Processor, 8GB Memory, 1TB Hard Drive and Windows 10 Pro (Monitor Not Included) (Refurbished) - Walmart.com