not very different from the US (accept for the accents). I remember a sailor from a flattop (uss enterprise) describe OZ as a colonial version of the US!
In regards to stuff here we dont get much as the population is only around 20 million and therefore mass marketing is less of an option. However we can get anything we want(via internet). Also Australia has strict design and safety rules. So somethings(cars for instance) have to be slightly redesigned for local rules (which makes them costly). But SUV are cheaper here than the US (based on currency conversion).
My friend who is teaching me to fly imports kits and he gets harrassed from the customs as they want to know the origin of the Balsa wood. Sydney is a great place to live but getting very crowded as the secret is now out!

G'day buddy have to get back to work. Hope your sim works