Elevated stays----- The E Stay trend started in the mainstream by the Nishiki Alien. The design for that bike came from Richard Cunningham of Mantis and his Valkryie. At the same time Ken Beach at Gecko was making the very nice and still underappreciated Gecko Genesis. MBA helped birth the Yeti Ultimate through their Ultimate project ,also some other companies have used such a geometry but Cannondale never as I know.
General the fork does not gives the impression headshok although it seems to share a similar principle......
my personal opinion is that apart from the stickers that bikes do not have anything to do with Cannondale
how much is worth?it is certainly an interesting piece even if you are researching something about the real manufacturer.....
I'm pretty much tracking retro pieces but I've never seen anything like that

super rare Browning forks(example)