1971 Demon 340 stroker

Since it is listed on ebay, what do you guys think is the going price for this Demon? I would love to get what I put into it, but that will never happen. craigslist is a joke with all the scammers and their not so subtle tricks. A guy in Poland (Diffy B James) is a guy to avoid and tried his tricks with me a few times in the past,
Thanks,
Mark