Oh damn this is from 2006, i am too late !!!
8700 $ then
How do you know that there is just one sample made?
And yes probably it is now in a collectors shelf - unused
"Seems like", I'm actually not sure.
If it had more than 2 made, I would have known about it. The fisheye nikkor 6mm f/5.6 or something, an engineering test sample lens for instance, only 3 copies were ever made. One is owned by a forum member here :O Can't tell off my head which one, this is his site:
http://redbook-jp.com/redbook-e/index.html