Dell Optiplex 390 MT Intel Core i3-2100, 4GB RAM, 120GB SSD, Windows 10 Pro | eBay
Dell Optiplex 390 Upgrade RAM, SSD, DVD Drive - YouTube
Amazon.com: Dell Optiplex 390 Tower Business High Performance Desktop Computer PC Wi-Fi (Intel Quad-Core i5-2400 up to 3.4GHz, 8GB DDR3 Memory, 2TB HDD, DVD, Windows 10 Pro 64-bit HDMI (Renewedd) : Electronics
8GB (2 X 4GB) Memory Upgrade for Dell Optiplex 390 DDR3 PC3-10600 1333MHz Desktop DIMM RAM (PARTS-QUICK Brand) at Amazon.com
Dell Optiplex 390 i3-2120 3.30GHz 8GB RAM NO HDD, NO OS – ASA College: Florida