Not really a development kit, as there are no details, schematics, board layouts, etc.
And I'd be willing to bet that no one is happy this is being sold.
Oh you can bet right, but this is some good stuff. Anyone that can do this work could easily take the blank card and pay to have it reverse engineered for $600 or less. The parts are nothing special and are all easily ordered off DigiKey. If I had the spare time and money I would be all over this thing.
Also if you look at the seller and have been following Vampire development you would know this was someone with all that at his disposal. I would bet its in that drive as well. At least a good chance of it. He isn't happy from what I have been hearing.
Just passing it on, this is crazy ebay thread after all!