If there is an oxymoron, it must be this: Trustworthy source of illegal drugs. Ok, I know that they aren't illegal in all countries, and you can order stuff via internet, but how in the hell you can ever deside which source is trustworthy or not? Selling piss for the bodybuilders is megabusiness in the internet, and if you get what you think you get, you have win in the lottery. There isn't such thing than trustworthy source of illegal drugs, there is only good and better scammers.
In some ways you hit the nail on the head, but it's not as cut and dry as that. I agree, most people talk about having a trustworthy source, and this is retarded...for most people, they trust the source just because a friend of their told them it was good or a few anonymous message board guys who happen to have numerous post.
Even so, there are high quality sources out there, very good. One thing many people don't realize is that the steroid market is unlike any recreational drug market; in-fact, the reason the war on steroids will never be won is because of this factor...these two markets are nothing a like, they can't even be compared yet they are approached in the same manner and that's why it fails.
As for the trustworthy source, there are plenty of people the world over who have various brands from various suppliers tested on a regular basis, it happens constantly and in many cases, many of the big labels are tested each and every batch. So sure, while there's a lot of crap out there, there's plenty of good gear too if you have the patience to find it and don't rely on brotastic knowledge.