I've only bought a new vehicle out of state once but it went smoothly. I stopped into my local Tag/Title county office, told them what ii was doing, and they told me EXACTLY what i needed to bring to them. Maybe if you call the office where you want to register your car, you could head off problems. And if the seller balks at giving you exactly what you need when you need it, maybe you should buy from someone else. Good Luck!