Dvd.co.uk is selling "Cars: Mater-National" for the Nintedo Wii for £17.99 (inc Del.)
You can get cashback on this from the usual sites (e.g. 4% Quidco making it just £17.27)
The next best price seems to be £24.48 from WH Smith.
Cars Mater-National features an all-new International group of racers vying for their chance to compete against Lightning McQueen in the First Annual Mater-National Race Festival, hosted by Lightning's best friend, Mater. Explore the new and improved open world of Radiator Springs, play in the all-new Monster Mode, jump into the fast lane with 6 new International racing competitors, burn rubber on new tracks, and twist and turn your way through new mini-games like Ramone's Rhythmic Rumble and Fillmore's Fuel Frenzy.
- Explore the new and improved open world of Radiator Springs 20 challenging mini-games
- 5 exciting new international characters
- Monster Mode
- Over 10 multiplayer games