Geforce GTX 480 and 470 got their prices, but again, these prices will vary from country to country. While in most of countries the pricing guideline is to sell GTX 480 for €450 in some countries it might sell for less than that, but in some it might go as high as €479.
The UK price is £429 at this also depends of the greed of retailers that will sell them, and Nvidia´s (read Fionas) power to sanction the ones who cross this price guide set by Nvidia.
The Geforce GTX 470 will sell for €349 in most of
Euroland, but the same rules apply. Some “cheaper” countries will get it below
this price and some more expensive countries e.g. Scandinavia will have to pay
a bit more than this. The UK chaps can count with £299 suggested etail price. We are very sure that Danish at Greenland will have to pay much more than the suggested etail price but won't worry about the cooling and the high TDP.
The launch is still early morning, midnightish on the night between
26th and 27th of March, but mass availability is expected April 6th.