Instructions
Start up GT5 and enter GT Mode, the game's main career mode.
Select the used car dealership, which can be found at the bottom of GT Mode's main menu.
Browse through the dealers stock until you find the DC2. If the car is in stock, you will be able to purchase it. If it is not in stock, continue to the next step.
Cycle the used car dealer's stock until the DC2 appears. The used car dealership will refresh its stock every five game days. To pass five game days, enter five races or license tests. It may take several attempts before the DC2 appears in stock.