I suspect this car, if restored, will be one of those where the cost to restore far out weighs the final value especially if shooting for a Grade 1 condition.
As for the seller look at all he has for sale. I did and most of his prices are nuts. The only item I found where the price is reasonable is the 1965 F100 dash bezel at $200. Just getting one rechromed, correctly I might add, would run $150-200 if it were still possible. So this NOS one is an actual bargain as all are faded and many have cracks after 56 years.