Can I buy a Bugatti Veyron Supersport dlc code for xbox 360 anywhere?

I want to buy a a dlc code for Test drive unlimited 2 for xbox 360. I know some people are charging $50.00 or more on ebay. Can some one tell me where I can buy one for cheaper thanks!|||Either a Friend, eBay, or sell yours and go to Wal-Mart. :)