these are nothing.... I have seen guys with sand blasted aluminum X-mart full suspension bikes claiming they are custom and cost such and such to build trying to rip people off.. but here is one:

http://vancouver.craigslist.org/bik/135541836.html

no doubt it may have been pricey in it's day but I don't consider Trek custom... maybe personalised compenents...

EDIT: sorry I am not implying this is an X-mart rip off attemp mearly an add I find humourous