If you don't live in the US, iTunes will prompt you to change your store to the US version when you click on one of the links to the iMixes. Songs are priced at the usual $0.99, while the 'albums' seem to be between $12 and $14 each depending on number of songs.
In honor of the recent PlayStation®2 computer entertainment system release of Grand Theft Auto: Vice City Stories, all eight music stations from the game's radio dial are now represented on iTunes via the Vice City Stories iMix Collection.
Visit the Music section at www.rockstargames.com/vicecitystories for more information
Link: Official Vice City Stories Website