Well, you don't see one of these every day, an Allen Millyard custom Kawasaki 5 cylinder 2 stroke is currently for sale. Millyard is known for his engines, handbuilt multi cylinder variants of stock engines, in this case an 850cc 5 cylinder made from two 3 cylinder donor engines.
The term handbuilt is exactly what it means, too, he does a lot of cutting and filing and mating of surfaces by hand, it's really incredible.
Starting bid is $42,500.00. For someone who wants a truly unique motorcycle, from a very uncommon builder, this is it.