Dvd.co.uk are selling "The Godfather: The Dons Edition" fr the Sony PS3 for £17.99 (inc Del.)
You can get cashback through the usual sites (e.g. 4% Quidco, making it just £17.27)
The next best price for the UK version seems to be £31.61 from Tesco.
The Godfather The Dons Edition for the PLAYSTATION 3 offers a brand new way to go from Street Soldier to Don as you gain control of the streets of New York. Follow the path an Enforcer or Operator; each with its own unique perks and abilities to earn. Now you can chat up specific characters to get the skinny on dirty cops, take down two additional revised compounds of rival Families, execute five new contract hits, and call in larger Corleone Hit Squads when the going gets tough. With The Godfather The Dons Edition also having the new Shipyard and Railyard transportation hubs to explore and exploit; your path to the head of La Cosa Nostra is wrought with all new perils and excitement. The Godfather The Dons Edition takes full advantage of the SIXAXIS controller for PLAYSTATION 3; manhandle your controller to manhandle your opponent.