Interesting finds here are not always of the two-wheeled variety.
Consider this, definitely a four-wheeled vehicle, that is currently up for auction. It's a Chevy truck once owned, driven and used by the King of Cool. Yes, that would be none other than Steve McQueen.
The truck has been recently refreshed with new paint, wooden bed, newer electrical system, etc. And it includes a very legit looking pink slip from a Steve McQueen. So it's not a motorcycle- but in my opinion it is definitely motorcycle-related!