I have Caremark insurance (CVS) and delestrogen as brand name, uncovered, is $187 a vial as of about a year ago so it may be higher. I would suggest you ask what discounts they offer and if you have insurance, argue for coverage if no generic is available (I got Caremark to cover delestrogen last year at the generic rate due to the shortage of the generic).
As of 12/2018, the generic is available again, so maybe try getting your hands on that instead.
Also, it seems that grocery store pharmacies are often more likely to work with you if you are off insurance. I have a couple tier 3 prescriptions that are not covered (like finesteride) and Wegmans of all places seems to be the lowest cost near me. As others have said definitely shop around and do not hesitate to ask for a lower price.
As others also mentioned, Mazzoni is subsidized since it's charter is to serve the uninsured and poor.