Harley, I'll throw in my comments for what they're worth.
1. If you are considering a consignment dealer, also check out Speciality Sales (showrooms in Benicia and Pleasanton). They had four Cobras when I visited the Benicia showroom two weeks ago. Check them out at:
www.specialtysales.com/
2. The price of the vehicle you are interested in seems a little high.
3. Strongly suggest you research and test drive many, many SPFs to get a feel for what you want. Take your time.
www.cobracountry.com is the best place to find your leads. If you live in CA don't consider anything but an SB100 licensed car.
4. You don't mention what you will use your Cobra for. Mostly street? Drags? Road course? The 460 block may tend to run a bit hotter and be a little more front-end heavy that a small block.
Good luck to you.