Refurbished: Dell Optiplex 780 Desktop - Intel Core 2 Duo E8400 3.0Ghz, 4GB DDR3 RAM, 250GB Hard Drive, DVD - Windows 7 Professional 64 Bit - Newegg.com
DELL OPTIPLEX 780 WIFI DVD-RW 3.0GHz 4GB Ram 500GB Hard Drive W/ Windows 10 Pro | eBay
Dell Optiplex 780 Windows 10 Pro Premium Desktop PC Tower Core 2 Duo 3.0GHz Processor 16GB RAM 2TB Hard Drive DVD-RW Wifi with a 19" LCD-Used Computer - Walmart.com
Dell Optiplex 780 Upgrade Options - Dell Community