Well you could do what Dennis James did, move to fucking Thailand and sell the shit over here and live like a king over there.
I know a pro, a very well known pro, and he and I trade info all the time and prices. He knows dealers that have been around for a while. They practically give the shit to him....for cost anyways....it bumps up their bulk so it brings down the price. So the dealer makes out good while the Pro gets his shit and is happy. Also, doctors are involved but only for things like GH and B12 and other things like diuretics and pain killers. I can tell you first hand that rarely pro's use mexican shit....apparently people are giving away some of that garbage. It is all Euro or American .....and the majority of it is in Amps cause those are the hardest to fake.