hmm it my be a good point
This is other way to look at it. I do not watch TV shopping channels because they lie and overprice their stuff. I have couple of NGC coin that in my opinion would grade higher and also I has some weir experience with NGC graded stained morgan. May be NGC give bigger discount to high volume dealers and PCGS is trying to keep their services contain so their coin price remain in higher level. May be it is just market demand ?
one cannot be sure. But if you buying a coin buy the coin and then grading company is in second place