Since such substances are illegal (in the US primarily) without a prescription, its not a whole lot different in legal terms than asking for a kilo of crack or heroin.
Keep yourself safe and stay private, get a secure email address (strips your IP, offers encryption on services that share keys).
And if you dont know somebody, dont solicite sources from them either, it makes people uncomfortable and nobody wants to lose their source because they wanted to help out a new guy. If you aren't new, then you already know these things. If you are new, then stick around, read and learn, and eventually you will find something.
NEW RULE...........If you are under 18 years of age, you have no reason to even be thinking of using steriods and are forbidden to post in the anabolic section! If you post, it will be deleted and you will be warned. Steroids WILL stunt your growth. They close the epiphysial plates in your bones and stop all possibility of any future growth. Further more using steroids during puberty, is playing Russian roulette. Erectile dysfunction (impotence), loss of libido and even infertility can be side effects of steroids. If you are a teenager wondering about steroids, take this advice very seriously. Read the boards, gain knowledge and learn so you can use them properly when you are old enough. You do not need them now. Steroids are not magic. They are merely effective hormonal supplements. They increase the rate of protein synthesis in the body, but to synthesize protein one still needs to take in enough protein, fats and carbs. Thinking that steroids will get you out of your rut and bad diet, is a big mistake. It takes years to get anywhere close to your maximum genetic potential. Diet is the key! If you can not gain weight by eating, steroids will not help you.