Yeah I saw that car. I was actually shopping SVT a few weeks ago.
2 problems though.....
SVT aren't the greatest for autocross because they top out in 2nd at 72mph. You can get that down a little with tire sizing, but basically you're stuck at low rpm with no torque.
Secondly, most cheap SVT have engine problems. Interference engine and known to fail if not maintained religiously. SVT were only made 2002-4 and are pretty rare. Closest junkyard motor is in Saskatchewan. Asking price $2250 plus freight, taxes, plus timing belt water pump etc and all of a sudden it's a $4000 car that's still not in great shape and disgustingly dirty.