Of all of these options none of them are outright safe; any site that allows you to buy testosterone by paying for it on their website you need to run for your life, as to do this you will be giving your credit card information to who knows who. As for gym dealers, this can be a tossup. If you can find a gym dealer who is not a middle man you may have a good source on your hands but understand if he gets into trouble himself he will more than likely sell you out at the first chance he gets if it saves his ass even slightly; most of them are scared and will not hold to any honorable line. Without question, when we buy testosterone on the black market there is no safe bet but there are some good sources out there who keep a low profile, use secure servers and email accounts and who are generally safe for most. In the end, understand, such purchases are illegal in many countries so if you choose this rout the risk is on you and you alone.
If you do not have the insurance and ask yourself “Where can I buy testosterone cheap?”, you should look for it online. Buy no prescription testosterone online, if you want to save money, but remember, that you should carefully check the pharmacy you're buying it from to avoid fraud and low-quality medications; though you can buy testosterone overnight in most of them, it is highly recommended to consult your doctor about how to get testosterone levels back to normal, before you try self-medication. And the last advice: you can look for testosterone reviews to determine which brand (or generic drug) is most suitable for you, according to its quality and cost.