We used hotelscombined for the Rydges Sydney - all the going rates were in the $400 range including with the hotel direct, ended up with an OTA (via hotelscombined) charging $239 for the same room (we wanted a twin room but ended up having to book a family room instead as no 'twins'). Too cheap to believe? We thought so, but booking was honoured/accepted without question.
That is a pretty reasonable bargain