Amazon.com: DELL Optiplex 990 Tower High Performance Business Desktop Computer, Intel Quad Core i5 up to 3.4GHz Processor, 8GB RAM, 2TB HDD, DVD, WiFi, Windows 10 Pro 64 Bit(Renewed)'] : Electronics
Dell OptiPlex 990 Desktop Computer PC, 3.10 GHz Intel Core i3, 8GB DDR3 RAM, 250GB Hard Disk Drive (HDD) SATA Hard Drive, Windows 10 Home 64bit (Renewed) | New Atlas
Scratch-N-Dent Dell Refurbished OptiPlex 990 Desktop Computer - Intel Core i3 (2nd Gen) - Microsoft Windows 10
Dell Optiplex 990 Tower Computer PC, 3.40 GHz Intel i7 Quad Core Gen 2, 16GB DDR3 RAM, 512GB SSD Hard Drive, Windows 10 Professional 64bit (Renewed) | McClatchy
Refurbished: Dell Optiplex 990 SFF - QUAD CORE Intel i5-2400 - 1TB 7200RPM HDD - 8 GB DDR3 RAM - WiFi - Dual Video Output - DVD-RW - Windows 7 Pro 64-Bit Operating System - Newegg.com
DELL OptiPlex 990 Desktop SDT Core i5 3.20GHz (2nd Gen.) 8GB RAM 500GB HDD DVD-RW Windows 10 Pro - Computer Show
Desktop Computer Dell Optiplex 990 USFF Intel i3 Processor 4GB RAM and a 250GB Hard Drive Loaded With Windows 10 Home Premium Used - Like New - Walmart.com
Dell Optiplex 990 MT i3-2100 3.1GHz 8GB 120GB SSD DVD Windows 10 Home | Computers \ Case \ Tower | AMSO
Dell Optiplex 990 Desktop Computer 3.1 GHz Core i3 Tower PC, 4GB, 250GB HDD, Windows 10 Home x64, 17" Monitor , USB Mouse & Keyboard (D990Ci34GB250GBW1017)