Next best I can find is £9.89 @ Base.com
Another 80p discount for students
Under threat from rival gangs and corrupt officials, the 3rd Street Saints must conquer the city of Stilwater or face destruction. From the spectacular opening battle to regain control of the local hood, Saint's Row offers an unparallel level of freedom to explore this living, breathing city. The player is free to engage in the multitude of different activates at his/his leisure, all the while building up respect in a gameplay-rich world. Build enough respect and the 3rd Street Saint's lieutenants will trust the player with more dangerous missions.