Hello, and welcome to Susan's. Someone should be along to give you the official welcome, but I wanted to address your question.
I get my testosterone at a local pharmacy and pay about $10 a month for the T itself and the needles. I was paying a bit more when I was on a higher dose, and I pay a little extra for other supplies such as alcohol swabs. I used to get T through the mail from Strohecker's, and I have filled a couple of scrips cheaply through Costco. However, if you are pretty young, you can have a hard time getting a prescription.
I suggest that you do a Google search for TransYouth Family Allies and see what information you can dredge up.