You're the one looking for a used FiST. Try to look for an unmodified, or at least not too modified car. You are going to pay through the nose for it, because it's already a cult car. The problem is, the cult likes to beat on the car, because it invites that. Then again, we're a cult. Someone is going to buy that FiST.
I wanted this car since it came out. I bought a new one in '17. You're getting a used one. Wait for a clean one, and pounce, because like Jeff said, they go quick, and you're going to pay handsomely in this market.
Totally worth it, IMO. If I had the money, I'd buy another one for a back up.