$180 .... you are being ripped off.
$20 for each document from the Official transcribers ....
The NSW BDM marriage register for the years 1856 to 1895 can have MANY MANY blanks. But with the official transcription copy, you get a clear picture of what those blanks are, AND you get the details of which church the couple married in, so you can in turn contact the Church, perhaps using the sample I wrote up for Bron earlier.
ADD, this way you get to the original record, which usually has ALL the info that was missed from the NSW BDM summary copy for the years 1856-1895.
Cheers, JM