Refurbished Dell Optiplex 780 Small Form Factor - Eco Computer Co.
Refurbished Dell Optiplex 780 Small Form Factor Desktop PC with Intel Core 2 Duo Processor, 8GB Memory, 1TB Hard Drive and Windows 10 Pro (Monitor Not Included) - Walmart.com
Refurbished Dell OptiPlex 780-T Desktop PC with Intel Core 2 Duo Processor, 8GB Memory, 2TB Hard Drive and Windows 10 Pro (Monitor Not Included) - Walmart.com
Refurbished Dell OptiPlex 780 Desktop PC with Intel Core 2 Duo E8400 Processor, 8GB Memory, 1TB Hard Drive and Windows 10 Pro (Monitor Not Included) - Walmart.com
Optiplex 780 - MUW
Dell Optiplex 780 Upgrade Options - Dell Community
Refurbished: DELL Desktop PC OptiPlex 780 Core 2 Duo 3.00GHz 4 GB 250GB HDD Windows 10 Pro 64-Bit - Newegg.com
Dell OptiPlex 780 Review | An affordable SFF desktop PC