DELL Optiplex 3020 Tower Desktop Computer PC, Intel Dual-Core i3, 250GB HDD, 4GB DDR3 RAM, Windows 10 Home, DVD, WIFI, USB Keyboard and Mouse (Used - Like New) - Walmart.com
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Dell OptiPlex 3020 Desktop Computer Tower Windows 11 Pro Intel Core i5 Processor 8GB RAM 2TB HDD with 19" Monitor Wi-Fi and Keyboard, Mouse - Used Desktop PC - Walmart.com
Amazon.com: DELL Optiplex 3020 SFF Slim Desktop Computer, Intel Core i3 4130 3.40 GHz, 4GB RAM, 500GB HDD, DVDRW, USB 3.0, Windows 10 Pro 64 Bit (Renewed)'] : Electronics
parts-quick 8GB DDR3 Memory for Dell Optiplex 3020 PC3-12800 1600MHz Non-ECC Desktop DIMM Compatible RAM Upgrade at Amazon.com
A-Tech 8GB Memory RAM for Dell OptiPlex 3020 SFF - DDR3 1600MHz PC3-12800 Non ECC DIMM 2Rx8 1.5V - Single Desktop Upgrade Module (Replacement for A6994446) at Amazon.com