Hi Tim
I dont have a Fisheye yet, although if i could offer any advice. I would consider this outlet in New York if you want to buy new. I know the aussie dollar is weaker on the American than it was a few months back but they are still a good deal. I bought my Canon 70-200L USM IS from them and saved $1500 on an outlet in Sydney and it was delivered by UPS within 5 days.
http://www.bhphotovideo.com/