Anybody want Sam's Real Pony?
Supernatural is selling the vehicle used in season six episodes as Sam Winchester's car.
November 2011 Update: One of the crew bought it a few weeks ago, but I'll leave the post here for posterity.
2006 Dodge Charger SRT-8, 6.1 liter Hemi V8 Automatic with 53k miles. Custom wheels, navigation system, leather, sunroof and the remains of a weapons box in the trunk (which we never saw in the episodes).
They are asking low $20k and will consider all serious offers.
If you are interested, leave me a comment and I can get you in touch with Jeff on the transpo team.
The old eBay listing is here. The photos on the listing are at the dealership when it was purchased for the show.