Once again we are offered items at an immensely inflated price in the UK compared to the US.
As of 2-10-2008:-
UK Amazon: £29.98 GBP ($52.96 USD @ current exchange rate)
US Amazon: $26.95 USD (£15.26 GBP @ current exchange rate)
It's a bit galling :-/
It does not state if the US discs are region free, probably not I guess, otherwise it would be cheaper to import!