Built in conjunction with the IVM Engineering Group of Germany, the C12 project was a combined effort between Callaway Cars (USA) and Callaway Competition (Germany). Using the C5 as the donor car, the C12 has a completely new body that’s a full two meters wide, which was needed to take advantage of Le Mans dimensional regulations. Engineers then developed a coil-over suspension with its own unique control arm, streamline tubing and high-pressure, gas-over-oil adjustable dampers. C12s cost an average of $200,000 a pop when new, and this one has just 24,432 miles on the clock. It’s up for auction right now on eBay and, as of writing, the top bid is just over $50,000.