Here's an interesting vintage racer for sale, though, seeing it's the only one ever made, you probably wouldn't want to thrash it at the track. It's a 1936 Supercharged Scott T.T. racer. It has a 500cc 2 cylinder, 2 stroke and according to the description was found on a dock in Great Yarmouth, Norfolk, England where the owner left it while he was spending time in a Japanese POW camp in WWII. The supercharger, among various other parts were missing, eventually found and the bike was totally restored.
This is definitely a pretty cool vintage motorcycle. Neat technology for 1936, too.
Link: 1936 Scott Works T.T. Supercharged - listing has ended