Shuttle XPC Barebone SG45H7 Mini PC 
It supports up to 16GB of DDR2 memory, Intel Core 2 Duo / Quad Core series with 1333/1066/800 MHz FSB, 16GB of DDR2 RAM, 7.1 channel audio, 1x PCI-Express v2.0 slot, Intel Graphics Media Accelerator (GMA) X4500HD graphics, Blu-ray, and highly-efficient 300 Watt power supply. For the connectivity, the machine provides Gigabit LAN, optical SPDIF, HDMI, VGA, FireWire, USB 2.0 and eSATA. You can bring home the Shuttle XPC Barebone SG45H7 with your $400.
what is th cot of this mini tower and mini notebook