The only supercharged example of the legendary British-made Vincent Black Lightning motorbike (pictured) was built to break the world speed record in 1950. While it never actually accomplished that, it willprobably break the world record for a motorcycle sold at auction when it goes on the block this Sunday at Bonhams (with an estimate of $400,000-$600,000). Now may not seem like the time to be spending half a mil on a vehicle without doors, but when it's this good-looking, we understand why you'd think about it.