David, Crofab (for all pit vipers in the U.S.) costs around $2K a vial. And one vial is not enough... I heard of one instance where the bill for a helicopter flight and two hospitals was $330K.
@ Bobby, if you ever decide to go into herps, don't count on being bitten. A responsible keeper should get lots of teaching by a mentor that keeps hots and you should never give any hot a chance to bit you.