Jimmy
The charge in NSW is $31 (plus GST if applicable) per hour. After the first hour this is charged in half hourly blocks.
Strata managers also charge extra for printing and photocopying but this varies as the more advanced offices are entirely electronic and allow searchers to copy files. Professional searchers carry portable scanners for paper documents.
A full historical search of the type mentioned above would probably require a good deal of photocopying or scanning as historical records (where kept) will not have been transferred to any electronic system.