As I always noted in these BL threads, there was also the special option from Cannondale that sold them as just framesets with a special black and gold anodized Suntour Superbe Pro derailleur set (I don't remember exactly, but it might have included a similarly finished Superbe headset too) that makes it more special than the package that came with the fully built bikes. Finding those derailleurs would make any Black lightning more desirable.
My brother still has one that he bought new in the 80's and I'm hoping he restores the thing back to it's former glory soon.....
Here's a not so clear pic of the gold and black Superbe Pro RD from his BL that he traded me for my Cyclone MkII many years ago because he wanted a more weight weenie RD:
I've since given it back to him so he can restore his BL back to original one day....
Chombi