Haven't been for a few years, but always found it to be pretty interesting (but expensive). I always figured it was expensive to get in because you were basically paying for the manufacturers to turn up.
Turns out the organisers charge the manufacturers heaps to display also.
In 2008 Mercedes-Benz rented the Mount Panorama race circuit for an entire week for less than it would cost to exhibit at the Sydney show. It invited VIP guests for track test drives and says it sold more cars than it would have done at the motor show.
What the fking ****? Where is all the money going? Surely Jeffs shed isn't that expensive to rent.