Mike,
of course I agree with you about new materials (paint, rubber, etc) being used during a restoration. If the referenced source is correct however, then the windows on this car had been enlarged, that is, the chassis was changed and had to be redone. Why should this car be almost 8x more than a true original like the Atalante?
Since this was a private sale we may never know for how much it actually sold. I cannot resist thinking that it is a PR ploy to talk up the values of either Mr. Mullins cars or those belonging to his associates, e.g., Kendall's Petersen Car Museum.