I think the '93 Cobra will become very collectable, particularly as more people learn about this car. Only 4993 produced (along with 107 R versions). I have always felt the '93 is the "forgotten" Cobra but have seen some Mustang magazines put the '93 in their lists of top 10 Mustangs of all time to own.
I believe the only options available were cloth or leather interior, color (black, red, teal), sunroof, and a special stereo system which never did become available. There were no convertibles in '93.