The "offshore pharmacy" gig is a well-known feeding ground for scammers and rip-off merchants; even formerly reputable suppliers have been known to go "rogue", sending counterfeit medications or just stealing your money, pure and simple. In short, attempting to buy drugs is a lottery, and even if you find a reliable vendor, the chances are its a foreign company, meaning anything you buy has to get past customs.
We're not allowed to openly exchange sources here on BL, so my advice to you would be to join a forum that deals exclusively with offshore pharmacies; some of those forums are decent, and usually share information on which companies are scammers or legitimate. I have to say though, trying to score drugs through internet companies is a bad idea, it's a paradise for scammers.