Update: It is not locked up. Finally put a wrench on the crank today. It turns very freely either direction about 60 degrees. Hits a hard stop from there. I'm speculating that it either broke one of the four chains or dropped a valve. I do not believe there is any kind of bottom end issue.
We will still sell it cheap until it makes it to the top of the heap in my shop, about a week or so, after that we will just fix it and sell it repaired for full price.
I can arrange shipping anywhere in the lower 48 for under $750, well under if you are closer.