While I do agree you can get more car for your money, it wouldn't be a back-halved 63 Chevy II. If a back-halved 63 Chevy II is what you want and this guy has a nice piece, buy it. There aren't that many 63's out there.
Back in 1988, when I was 18, I wanted a 70 Chevelle. I searched long and hard for just the right car. Found a 307 2bbl car that had never been wrecked and still had the hubcaps on it. It cost me good money and I pulled pretty much everything out of it but it was a solid base with everything intact. I still own the car.