The top pop trend Is insane. There are 70 points on the NGC scale, each one of which is worth 1.43% - a very small amount when one considers the extent to which subjectivity, inconsistency and carelessness must go into each grading. To pay thousands extra for a top pop is crazy, considering a) that it can be beaten, or b) that the grader may be having an off day/his colleagues are stricter/softer than him, has to be the height of stupidity, unless you are literally the initial seller about to make a killing from someone prepared to pay.
The only true winners are those ex graded items from the first seller, who knows, that for a short time at least, he has the lead item.
Comparison with the coins just under top pop would probably reveal examples that were superior to the current top pop.