For sale is a 1993 CB750 custom build. The build is detailed in the Bike Exif article (titled "Day and Night: Radically improving the CB750 Nighthawk")
The bike was recently in the Hand Built Show in Portland Oregon and I've done some miles on it since then but overall, it looks in great condition.
I have the title in hand. It's located in Encinitas. It can be delivered if you're out of state if the costs of transit are covered.
Email me with any questions and I'll respond as quickly as I can.