Refurbished: Dell OptiPlex 780 USFF Desktop Intel Core 2 Duo E8400 3.0GHz 4GB DDR3 RAM 250GB HD DVD-RW WiFi Bluetooth Microsoft Windows 7 Professional 64-Bit - Newegg.com
Solved: Is the Dell Optiplex 780 mt with the Intel Core 2 Quad Q9550 still good in 2020? - Dell Community
Refurbished Dell Optiplex 780 Small Form Factor - Eco Computer Co.
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Refurbished: Dell OptiPlex 780 USFF Desktop Intel Core 2 Duo E8400 3.0GHz 4GB DDR3 RAM 250 GB HD DVD-RW WiFi Bluetooth Microsoft Windows 10 Pro - Newegg.com