Refurbished: Dell OptiPlex 990 Mini Tower Intel Core i7-2600 16 GB DDR3 RAM 1TB HD DVD-RW Windows 10 Pro WiFi - Newegg.com
Dell Optiplex 990 DT - Intel Core i7 3.40GHz, 8GB RAM, Windows 10 Pro – Coretek Computers
Dell Refurbished OptiPlex 990 Desktop Intel Core i5 4GB Memory 1TB Hard Drive Silver 990 SFF-0827 - Best Buy
Dell OptiPlex 990 Tower PC, 3.2 GHz Intel i5 Quad Core Gen 2, 16GB DDR3 RAM, 1TB SATA HD, Windows 10 Professional 64 Bit (Refurbished Grade B) | StackSocial
Amazon.com: Dell Optiplex 990 Desktop Computer - Intel Core i7 3.8GHz, 16GB DDR3, New 500GB SSD, Windows 10 Pro 64-Bit, WiFi, DVDRW (Renewed) : Electronics
Dell Optiplex 990 Desktop Computer PC, 3.20 GHz Intel i5 Quad Core Gen 2, 4GB DDR3 RAM, 250GB SATA Hard Drive, Windows 11 Home 64bit - Walmart.com
Amazon.com: DELL Optiplex 990 SFF Flagship Premium Business Desktop Computer (Intel Quad-Core i5-2400 up to 3.4GHz, 16GB RAM, 2TB HDD, DVD, WiFi, VGA, DisplayPort, Windows 10 Professional) (Renewed)'] : Electronics