Hi Ali,
I was just going to say that there are at least 3 ladies in the TWW thread who are doing IUI. Maybe you could jump in there and ask them a question or two about cost, their experiences and successes etc.
Sorry i can't help more than that. I am neither in Sydney, nor am i a candidate for IUI!! But i can say that i have noticed a few more ladies seem to be doing IUI in here.
Good luck with whatever you decide and i hope you can get some advice and help here.

Jo