Discount New Cars

[bob^]

I'm looking around at buying a new car, and on my union website there was mention of www.discountnewcars.com.au.
Has anyone ever dealt with them? How do they work?
I lodged an enquiry on a Mazda3 last night on their website, and this morning I got a call from a local (Geelong) number. He claims he couldn't give me a price because I wasn't going to buy for another few months(which I understand), but said he should be able to "do me a ripper deal" and knock at least 2k off the rrp.
The next question is, should I hold out until after the new year to buy the car, or buy in December.
Cheers