I have a Dell OptiPlex 780 service tag HS4YVL1. It has a Pentium dual core 2.6ghz cpu in it and 2x1gb sticks of ddr3 (4 slots expandable to 16gb of ram) and a 160gb hdd. With dell keyboard and Toshiba optical mouse and Windows 7 Pro CD key and preinstalled. Looking at $200 or obo. send me a private email back if interested or have any questions. Ryan