I was in sydney in August and stayed at the Rennaisance. They had a buy one night, get one free promo. I think the one night price was about $190 AUS. That would make it really about $95 AUS/night, but it's a perfect location and a very nice hotel. I forget the promo code, but I'm sure you can just call and ask for the buy one night, get one free deal (if they still have it).