In the US, prohormones such as androstendione are classified the same as steroids and are just as illegal. In fact, your bottle of 100 capsules of andro might actually be "more illegal" than a 10cc vial of test enant, due to the say "dosage units" are calculated for liquids vs. pills for purposes of sentencing...
In any event, it's your choice whether or not to break the law. If you choose to do so, you have a choice between two illegal things, one that definitely works (aas), and one that does not or does only marginally (ph).