Good stuff!!! I think you've got a great deal there. That's excellent that you were able to inspect it in person before buying. A few scuff marks on the rubber shouldn't be unusual for a 5 year old body.
I've read profiles of pro photo photographers, and their images have really amazed me. When I read their bio I expect that they're using the latest and greatest of gear but have been surprised when they still use a 1Ds Mk II or even older. So it definately can produce the goods. Just goes to show that in the right hands the gear doesn't make the shot - not to say that the 1Ds Mk II isn't a superb camera.
Enjoy the new toy, I look forward to seeing some shots.
Ben.