the dealer you spoke to obviously has no clue as to what he is talking about. There was a 50 percent tax waiver on the value of investment if it was purchased on or before December 31st 2009. MEANING that you do NOT get your car for half price, it's just that 50 percent on the value of your vehicle is offset against your business income. Let's say If the Car is valued at 40 thousand, 20 thousand is tax free. Meaning that on your profit and loss statement you get 20 thousand get deducted from your taxable income. So instead of being taxed on let's say 100 000, you get taxed on 80 thousand. It is still a saving of several thousand. Another great benefit of having a business is that you act as a tax collection agency,meaning that the GST on your purchases is also offset against your gst owing, which in itself is already several thousand less.
You are seeing a lot of those cars, because a lot of people are choosing to buy those over other makes, as they are very good cars with a fantastic value.