"There is no question that a nice problem-free chip carries a higher price than a similar chip with "problems". The amount of difference between a problem-free chip and one with wear determines the grade."

In any grading/condition description, the above is not always true when it comes to chips. There are certain chips that are known to be only in cancelled or sometimes very worn condition. With these items, the 'rarity' of it determines the price NOT the grade/condition. I'm just fearful that NEW collectors will not know the difference unless stated as a NOTE in the final product.
Just my 2¢ worth..........

Steve