SoftUK are selling "Tony Hawks American Wasteland" for the Xbox 360 for £8.99.
Use the code "Cheap Games" (without quotes) to get free delivery.
You can get cashback via some sites (e.g. 2% Free Fivers, making it £8.81). You can also get 6% cashback through SoftUK's 'Collector' program
Next best price seems to be £14.99 from ShopTo.
No levels. No load times. Just never-ending action that doesnt stop until you leave the game! Tony Hawks American Wasteland gives you - for the first time ever in a Tony Hawk game - the freedom to skate or bike, throughout a rich, expansive open environment. Once you arrive in Los Angeles, the vast city that gave birth to skate culture, the skys the limit as you progress through the Wasteland story and choose missions that will have you immersed in the action without ever skating the same line twice!
* Freedom to Ride Forever: No load times. No level-based gameplay. In American Wasteland you travel throughout the vast urban terrain of Los Angeles including: Hollywood, East L.A. and other landmark areas without restrictions or repetition.
* Ultimate Player Control: More tricks and expanded controls than ever before! New on the board tricks include the Bert slides, Natas spins handstands, and one-footed grinds and manuals. New off the board tricks include wall runs, wall flips, and charged jumps.
* Choose board or Bike: For the first time, you can choose to ride BMX bikes throughout the entire game, with all-new physics, a BMX-specific control system and several BMX-specific goals.
* Customize Like Crazy: Enter and explore dozens of shops in-game to customize your gear and your look! Check out skate shops, barbershops, tattoo parlors, and clothing stores as you accomplish goals and earn cash.