Penn State Championship Watches
A friend is selling on Ebay 2 Penn State watches from the national championship seasons of 1982 and 1986. They were sold as collector's items and are in their original boxes.
He has no idea what price to put on them. Ebay has lots of PSU watches, but none of this type. Google doesn't bring up anything either. What would be a good way to approximate the values of these watches?