I just upgraded to a Macbook Pro so this one is expendable. I just cleaned everything up and reinstalled OS X Snow Leopard so she's all ready for a new owner. This has been our home computer for the last 3 years or so and there are a few scratches here and there, there is one big ding in the front (shown in the pics) and the keys are a little dirty. It has its cosmetic issues, but it still works great! I did clean it, but I'll admit I didn't scrub.
The memory has been upgraded to 4 GB from the stock 2 GB it came with and I'll send the original along with it. Also includes the Snow Leopard start up disk.
Specs from the box:
2.4 Ghz Intel Core 2 Duo proceesor
2 GB SDRAM
160 GB 5400-rpm hard drive
13" diagonal TFT glossy widescreen display: 1280x800 pixels
Intel GMA X3100 graphics processor with 144 MB of DDR2 SDRAM shared with main memory
built in iSight video camera
slot loading 8x Superdrive
Firewire 400 port; 2 USB 2.0 ports
Optical digital audio input/audio line in, optical digital audio out/headphone out, built in stereo speakers
built in 10/100/1000 BASE-T Ethernet
Airport Extreme wireless (802.11n); Bluetooth 2.0 + EDR
I'll be the first to admit that I don't know a lot about computers but I'll try to answer any questions that you have.
$550 shipped and insured. US and PayPal only 
