Free money (2 PSPs&2 games)
(This takes time, but is effortless.)
If you have access to 2 PSPs and 2 copies of Gran Turismo, simply enter into a garage and create/join a race together. Pick the fastest car in the (primary) garage. Go to the Test Ring track, and set the laps to 99. The higher the laps, the bigger the prize money. Start the race, and with the primary car, pause and set the game to autopilot. Come back after a while and collect your free money. Go shopping for a faster for a faster car. The faster the car, the quicker the race, easy. After you have more money and cars than you need, you can do the process all over again with the other PSP, or (while the game is in play) swap the memory sticks, and save the money onto the other card as well. I know it can be frustrating to take the time to earn the money it takes to buy the cars you really want without using cheats or codes. I was happy when I found this out, I hope you enjoy it as well.
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