An iPhone 4 is more expensive than a 3G S. Either way, this is a good deal, I'm out but only because I'm going to buy one from the US, anyone not in this situation and looking to get one can save themselves a decent wedge.
It won't be more expensive... first models are always more expensive, it will be the same price but with cameras and a bit thinner (so more features for the same price).
An iPhone 4 is more expensive than a 3G S. Either way, this is a good deal, I'm out but only because I'm going to buy one from the US, anyone not in this situation and looking to get one can save themselves a decent wedge.