The car is a 1984 Audi 4000s Quattro. It was owned by a mechanic at at West German Garage in Raleigh, NC. He listed the car on Craig's List for $500 and accepted $400. The car runs and included a nice array of spare parts in the trunk.
Racing is both prestigious and expensive. Consider this: Altria (parent company of Philip Morris, owner of the Marlboro brand) is the lead sponsor of the Ferrari F1 racing team. Between their 2005-2011 sponsorship cost $1,000,000,000 (1 billion USD).
To be honest, Team Quattro Libre is neither prestigious nor expensive. But we still crave sponsorship.
For $100 you get: (a) 1' square space (b) website praise and (c) guaranteed business growth. (Two of three, our choice.)