MSY are selling the Intel Celeron D430 CPU at a bargain clearance price of $15 although you might find that it is hard to find the appropriate motherboard etc.
Specifications:
Essentials
Status Launched
Launch Date Q2'07
Processor Number 430
No. of Cores 1
No. of Threads 1
Clock Speed 1.8 GHz
L2 Cache 512 KB
Bus/Core Ratio 9.0
FSB Speed 800 MHz
FSB Parity No
Instruction Set 64-bit
Embedded Options Available No
Supplemental SKU No
Lithography 65 nm
Max TDP 35 W
VID Voltage Range 1.00V-1.3375V
Recommended Customer Price TRAY: $34
BOX : $37
Graphics Specifications
Integrated Graphics No
Package Specifications
TCASE 60.4°C
Package Size 37.5mm x 37.5mm
Processing Die Size 77 mm2
No. of Processing Die Transistors 105 million
Sockets Supported LGA775
Low Halogen Options Available See MDDS
Advanced Technologies
Intel® Turbo Boost Technology No
Intel® Hyper-Threading Technology No
Intel® Virtualization Technology (VT-x) No
Intel® Virtualization Technology for Directed I/O (VT-d) No
Intel® Trusted Execution Technology No
AES New Instructions No
Intel® 64 Yes
Idle States No
Enhanced Intel SpeedStep® Technology No
Intel® Demand Based Switching No
Thermal Monitoring Technologies Yes
Execute Disable Bit Yes
Single core, single thread goodness.
As cheap as the CPU is, the prices of DDR2 memory has skyrocketed so much that it offsets any savings you would have by buying the CPU.
But it's good for building project if you have old spare parts lying around.