[wepple]

There are actually some independent people who test various drugs on Silk Road. Obviously they could be wrong/rigged, but it seems like a far better step than buying anywhere else:

The LSD Avengers are a group of individuals that perform trip, reagent, and lab tests on LSD that is found on the Silk Road in order to verify the legitimacy of the product and to weed out scammers. Their primary goal is to aide individuals in easily finding the holy grail of psychedelics.