This is part of the problem in the collector car market these days, but not as you would imply. Why can't a car be taken for face value regardless of what modifications may have been done to it? Why, because the numbers-matching, totally original, all-else-be-damned muscle car snob crowd has managed to over inflate the market with this nonsense to the point where all but the most well-heeled are pretty much out of the picture these days.
But I do agree it was a bit high. Sorry for the rant.