2003 Buell Race Bike XB9 XB12

This 2003 Buell race chassis has its VIN X'd out and stamped "Race Only"—meaning it's a genuine factory race frame with Penske suspension and carbon fiber mods that'll never be street-legal, but that's exactly why it's worth five grand to someone building an unlimited race bike. If you understand why a purpose-built race chassis with provenance beats another Harley clone, this is your parts car.