TDU Downloadable Content on XBLM
For an additional 350 points, you can download the ' Test Drive Collection - Volume 1', which includes the following vehicles: RUF RGT, Koenigsegg CCR, Noble M400, Corvette C6 Convertible, Ferrari 250 GTO 1962, and Lamborghini Countach 25th Anniversary Edition. All downloads are available in all Xbox Live regions, but you will still need in-game currency to purchase them from the respective dealers.
Thanks to Major Nelson for the info