Just for the hell of it, I built an Optiplex 360 brand new online where they are giving a $304 instant discount. System with a new 22 inch widescreen monitor came to a total of $519. That was with a Core 2 Duo. Just understand that there is a difference between Intel Dual Core and Core 2 Duo. Core 2 Duo being the better processor.This is with a 3 year warranty. I built it with Home premium, so you'd have to choose which OS you want at a small additional cost, but nevertheless, I thought you were asking for a monitor as well last time you mentioned it so I built it with one. You would have to buy it under Small Business section which is the same as purchasing through Home Office.
BASE OptiPlex 360 Minitower Base edit
OPERATING SYSTEM Genuine Windows Vista® Home Basic,SP1, with media,32 Edition English edit
ENERGY SMART No Energy Smart Selected edit
POWER SUPPLY OptiPlex 360 Minitower Chassis with Standard Power Supply edit
PROCESSOR Intel® Core™ 2 Duo Processor E7400 (2.80GHz, 3M, 1066MHz FSB) edit
WARRANTY & SERVICE 3 Year Basic Limited Warranty and 3 Year NBD On-Site MEMORY 2.0GB DDR2 Non-ECC SDRAM, 800MHz, (1DIMM) edit
HARD DRIVE 250GB SATA 3.0Gb/s and 8MB DataBurst Cache™ edit
OPTICAL DRIVE 16X DVD-R SATA, Roxio Creator™ Cyberlink Power DVD™ edit
VIDEO CARD Integrated Video, Intel® GMA3100 edit
MONITOR Dell 22 inch E2209W Widescreen edit
RESOURCE CD AND DVD Resource DVD - contains Diagnostics and Drivers for Vista systems edit
KEYBOARD Dell USB Keyboard, No Hot Keys edit
MOUSE New Dell USB Optical Mouse with Scroll, All Black Design edit
SPEAKERS No Speaker, OptiPlex