More pluses for a '93 Cobra are if it has a fairly extensive history and all (or most) of the original parts either still installed or available for sale with the car. Also, it's nice to have a complete owner history (i.e. copies of the titles from each owner).
It's great to find a really clean one that you can enjoy but considering that there were only 4,993 made and many of them have been crashed, stolen, or altered far from being original at all, an actual nice one is hard to come by. Choose very carefully!