I have heard that freedom pharmacy is a good online place to go.
I have also heard that several women have had luck checking with the RE to see if other ladies have donated unused stuff.
When I did my IVF, my RE recommended a specialty pharmacy, it was a place that often compounded their own meds, it was the only place I could get my progesterone suppositorites. And, they had the Menopure for $250 for teh same amount that CVS had for $4k. However, my insurance didn't cover them. I then found out that the Kroger pharmacy down the street from them matched their prices, and my insurance DID cover Kroger. So, I got my Menopure for a $25 co pay.
So I suggest shop around your area. I didn't realize until I went through the IVF that there could be such a difference in price of meds from one pharmacy to another. Also, check with your RE or even with other offices to see if there's anyone they recommend. If your RE doesn't know of a good place to get stuff inexpensively, another office might, even if you aren't a patient there.