That looks like a really good deal. With XTR pretty much everything except shifters i would say go for it. I looked on the specialized website and the components on the 05 enduro comp were not as good as the one you listed here. As a matter of fact, those are the components for the 05 S-Works Enduro which is probably gunna run you about $5000. But if the bike was upgraded in the store or something (which i doubt) and they want to sell you it for $18-- thats amazing, just dont thing thats what your getting stock.