picking the car up at the airport rental on gilespie dec 16th around 9:45pm returning car dec 20th around noon. I am a hertz gold member but the approximate costs is still $306.76. Is hertz usually always this high? Are there any discounts I need to try and find as I am a government employee and a member of chicago aaa which gave me 10% off? I do not wait in line and go directly to car and leave. Any thoughts ?