You've hit a goldmine and its name is Dollar rent a car at Newark airport. The counter help is trained to pad there pay check by telling you your car class, economy, is not available and will not be for 15-20 minutes. They will tell you if you want a car now, you'll have to pay more. Another trick is if you are a few minutes late from your reservation time to rent the car, they will tell you, you have to pay up for a more expensive car because your reservation is invalid. If you show that you will not be intimidated and demand you car now at the reservation price you will get your way. You want a made for TV moment. Send someone with a hidden camera to Dollar at Newark airport at 6:30ish PM on a Friday and arrive a few minutes late for your pickup. They'll try to pull this scam on you. Have not rented from them in over a year because of this.