PA no title car wanting to buy- what to do??

If it comes from out of state it is different than one already title in PA. I just did the one from Delaware for the Dart in my Avitar. He signed the title but did not notarize it. I did a tracing of the VIN and went to the AAA office and I got my title just yesterday. But if the car is registered in PA the guy who has the title has to go with you or have it notarized.