That's a Waywell unit shown on ebay, not on Rosen. You'll find a mega-thread on those originally started some 18 months ago by Bazzle. There are many happy users of the Waywell unit who bought it direct from the Shengzen factory a while back (me included). Total price landed even back then was $500, and that was when the dollar was about 0.77 USD so you should be able to get it landed for $400 tops. BUT, buying it off ebay will give you a little more recourse IF there's something wrong with the unit. A couple of folk did receive faulty units back in the day, and I understand they had to wear the return postage costs to get another unit to replace it.
The unit itself has been absolutely fine for me - in fact, in some respects I think it's better than the OEM option because it is more flexible (e.g. whatever maps you want to load, much more 'open' ipod / USB stick link ups, separate SD card slot if you want to use that for music). The sound quality is also very good for a unit that costs very little.
In the WD6050 thread (mentioned above) you'd probably also find a sydney forum user who would be willing to give you a hand installing it - so long as you're not installing the rear view camera, it's no sweat. Installing the rear view camera is A LOT of sweat to do it properly!
So, back when I bought mine, there weren't OEM GPS options for $1,000. I would check whether any OEM one has bluetooth. I suspect you may need to buy the bluetooth pack on top of it - which if you source locally will cost you another $500ish I think. But I'm happy to be wrong on that. The Waywell comes with bluetooth... I bought it instead of buying just bluetooth when Victoria brought in its new "don't fiddle with your gadgets while driving" laws.
If I was buying now, and if I was actually able to find one of those OEM ones that did have bluetooth, I'd probably go with that simply to be able to refer to it as 'factory GPS' if it came time to sell the R. But that's not saying the Waywell (the second gen one, which is high-res 640*480) isn't a good unit - it is a lot of bang for very little buck.
My $0.02.
