Just a quick message, apple announced the new iPhone3G, which is an updated version of the iphone sold on ebay at the moment.
The new phone will have a price tag of only $200 for the 8gb, and $300 for the 16gb.
The new Phone3G will be released in Australia on July 11th, via Optus and Vodafone.
Unlike the old one, the new iPhone3G has GPS built-in, 3G (Faster internet), its cheaper, looks better, and is thinner.
Here is a link so you can see the new iPhone3G for yourself: http://www.apple.com/au/iphone/
I would advise against purchasing the current iPhone until the new one comes out, or you will lose a lot of money!!!
I hope this has been helpful for you,