Restored Dell OptiPlex 755 Tower Desktop PC with Intel Core 2 Quad Q6600 Processor, 4GB Memory, 500GB Hard Drive and Windows 10 Pro (Monitor Not Included) (Refurbished) - Walmart.com
Refurbished: Dell Optiplex 755 Small Form Factor Desktop (R2/Ready for Reuse) with Intel Celeron 430@1.80GHz, 2GB RAM, 80GB HD and licensed Windows 7 Home Premium from a Microsoft Authorized Refurbisher - Newegg.com
Trash-picked Dell Optiplex 755 USFF - YouTube
8GB 4X2GB Dell OptiPlex 755 Series Desktop/PC DDR2 PC2-5300 RAM Memory at Amazon.com