Only two of those cars were ever built. Cosby only ever drove the car once and returned it to Shelby American and Carroll Shelbys own sold for 5.5 mil at Barrett Jackson 3 weeks ago. Heres a link
I remember reading in a magazine a looong time ago, that shelby found a stock of old cobra parts and unpainted aluminum body's or somethin,and that these guys from jail were building, and he was selling them for half a mill. that was like 10 years ago or so.
Cosby's cobra got sold to someone else after Bill got rid of it, and it got completely destroyed later in a horrendous accident. Someone supposedly "rebuilt" it based on the VIN though.
btw, a good bit of Cosby's old comedy album called "200 mph" is based on that car.