Watch out. Those things can easily run low 13's when modified, they are like the '03 cobra's little brother, just add a pulley and they get pretty fast.
However, if the owner does not know the difference between a torque wrench and vise grips, it probably isn't modified and will run high 14's at best.
Modified SC's are pretty rare, because not too many SC's are out there and they didn't really sell to the performance crowd because the were pretty heavy and expensive. They are pretty cheap now, but hard to find and most people would rather have a v-8 any way.