Hello there. Are you looking to buy it used or new?
If you want to buy it new, just go to the manufacturer's website http://www.zeroimage.com/ and just buy it there. Prices are about to be increased I'm told, so you better make it quick.
I was looking to buy one too a few weeks ago, apparently no one had it for sale here. So I just bought it from the website directly. Payment via PayPal is super easy and it only takes 4 days for the camera to arrive at your doorstep.
I have a Zero 2000 that I may consider selling. The finish is wearing off around the seams, not terrible, just not get. The finish is the only wrong with it. Other than that, It works great. I have the 45 and 612 multiformat camera so the 2000 isn't used as much anymore. - Sean