I wasn't too surprised by the price:  Erowid DMT Vault: Basics

It's a high risk, high potency, scarcely available, connoisseur psychedelic.  It's got more class and mystique than any other drug out there.

Also, yes there is no active surveillance trying to pinpoint DMT users and labs.  Law enforcement is generally interested in meth labs and high-dollar/high-traffic drugs, which is one of the reasons they tend to bust dealers.  The other reason is that dealers tend to be less personally discerning of their acquaintances than the casual user or the sincere hobbyists.  They seek out a customer base from a demographic riddled with informants, potential informants, and narcs.