My first thought $3500-$5000 too.
Some states listed the title when the car was first sold. Even though we all know it's a 63,it may be titled as a 64 if bought after January 64. My neighbor (this was long ago) had a 55 Chevy original owner and was selling it to my brother. He said "It's a 54" we disagreed.Till we saw the title. It was listed as a 54. Date was November 1954 when the title was issued. Just a thought..
