It depends on the customer relationship you hold with Qantas.
In 2004, the 747-200 sim was charged out at around $120 per hour for pilot recruiting to its subsidiaries (peppercorn rate). As was the 767-200 and 300 sims in later years.
I ran a few workmates through the Cathay sim profile in the 747-200 privately, and was charged $150 per hour, but I was staff. Same went for the 767-300 configured for the Virgin (sic) profile.
Typically, the internal running cost to the company for the newer sims is around $600 per hour.
On top of that you will pay the cost of the instructor, plus whatever their margin on the sim is.
Hope this helps.