That's a piece of mountain bike history. I'd sell it back to Specialized USA, sure they'd want a fair bit of money for it.
My mate who i used to work with at a bike shop is currently building a retro re-build of a GT Lobo DH, orginal Boxxers, XTR cranks, brand new Shimano Airlines pneumatic gearing, basically the D's B's from 10/11 years ago i'll get some pics when its finally done, should be amazing!