Filip Chudzinski has created a very clean and helpful document, in which all the international prices for an unlocked iPhone 4 are gathered.
Costs vary a lot. In the document, we can see that the iPhone 4 16GB has a minimum price of 496 € (from Hong Kong) and a maximum price of 659 € (from Italy). Prices for the 32 GB model range from 585 € (always in Hong Kong) to 779 € (always in Italy). The average prices are: 594,21 € for the 16 GB model and 699,29 € for the 32 GB model.
Unlocked iPhone 4 international pricing
In this document you can look at all the international prices (till now) for an unlocked (not branded) iPhone 4. Those countries above which you see a lock are the ones where you can only buy a branded iPhone (so, no "native" unlocked iPhone 4 is available).
Everyone should know, by now. The latest Apple creation, the astonishing new iPhone 4, has some really big issues. The main is certainly the so called "death-grip": depending on how you hold the phone, it eventually loses signal and drops calls. As Apple said, "X marks the spot", the spot being the little gap between two external antennas on the outer edge of the new iPhone.
I will try to demonstrate that Apple is avoiding the problem giving void answer and trying to pilot the customers' and press opinion towards wrong concepts.
I will not post here the (really) many video demonstrating how you can make calls drop just using one finger, but I suggest you to search for them on YouTube. This is what actually happens: if you short-circuit the two antennas using your hand (or finger) the antenna reception gets weaker, signal drops from 5 or 4 bars to 1 or 0, and eventually the call drops.