I've not bought it only and though I totally get how frustrating it is that you're constantly having to wait (currently waiting till next year for my next IVF) I think buying it online is a pretty risky thing to do. I would personally recommend you don't. Even if (and it is of) you actually get the right drugs, you need monitoring while taking Clomid.
What makes you think you need it? Are you not ovulating? If not (or if you are unsure) you need to revisit the dr or maybe see another and push for a referral to your local fertility clinic, or at very least blood tests to determine if ovulation is happening. If you are ovulating, Clomid is unlikely to help much.
How long have you been trying? If its over 12 months (six months of you're over 35) then you ought to be referred straight away anyway.
I really do know how massively frustrating it is when all you want is a baby, but it really doesn't make sense to buy drugs off some dodgy Internet site.
I have taken clomid before (successfully) and I just think it'll kick start things this time.... But my gut feeling is not enough so I will have to do charting to prove I am not ovulating... Although a part of me wishes I had a box left, I guess I will just have to wait. But it's so hard when the age gap is now so huge. But perhaps I am being selfish wanting more :-(