It's not the same thing but ChangJiang M1 bikes (from Shanghai) go for about 20,000RMB ($3,500). They're made from the original tooling of the 1930's BMW R71 model -- the factory was originally taken over by the Russians post-WW2 which the Chinese military then moved over to China in the early 1960's. I've heard of some people doing motor swaps to BMW boxers for a bit of reliability.
Some old Honda Racebikes:
1960's Factory CB750 Racebikes
1970's CB750
1980's CBX (Inline 6 Cyl)
1990's VF1000R.