I don't think that it is stolen; I think that it simply doesn't exist as far as the 'seller' is concerned. They have probably copied the blurb from a real advert along with the pics, and put an ad on craigslist at a silly price. They hope someone is daft enough to pay without seeing the bike, and then of course the bike will never materialise.
Ask yourself why they didn't put it on
ebay and get a realistic price, if they are willing to deal via ebay?