AMD Athlon X2 7550 Kuma 2.5GHz Processor + ECS A780GM-A Motherboard + CORSAIR XMS2 4GB Memory + Western Digital 320GB Hard Drive for $149.96

AMD Athlon X2 7550 Kuma 2.5GHz Processor
Core Kuma
Multi-Core Dual-Core
Name Athlon X2 7550
Operating Frequency 2.5GHz
Hyper Transports 3600MHz
L2 Cache 2 x 512KB
L3 Cache 2MB

ECS A780GM-A Motherboard
The A780GM-A is ECS Black Series platform, The A780GM-A provides the AMD latest technology Hybrid Graphics and also features support for UVD 2.0, DirectX 10, PCI Express2.0 and HDMI/HDCP for the extreme graphic performance computing. The ECS A780GM-A is the best reliable choice for AMD AM2+ platform.

CORSAIR XMS2 4GB Desktop Memory
Capacity 4GB (2 x 2GB)
Speed DDR2 800 (PC2 6400)
Cas Latency 5
Timing 5-5-5-18
Voltage 1.9V
Multi-channel Kit Dual Channel Kit
Heat Spreader Yes

Western Digital 320GB Hard Drive
Cool - Cool operation results in the highest reliability, even in intensely hot environments such as digital video recorders. That's why these, the coolest on the market, are the drives of choice for the world's leading consumer electronics and PC manufacturers.
Quiet - The technology that Tom's Hardware Guide called "very fast and nearly silent" is used throughout this family of drives. Our WhisperDrive technology minimizes noise to levels near the threshold of human hearing. To cut seek noise, SoftSeek technology streamlines read/write seeking algorithms, resulting in more efficient operation.