...and even in the world of Overstreet, using its own limited and selective methodology this is your game changer:
http://www.ebay.com/itm/INCREDIBLE-HULK-181-WHITE-PAGES-CGC-GRADED-9-2-NOVEMBER-1974-/400755267796?pt=US_Comic_Books&hash=item5d4ee018d4
-J.
Except that now you're trying to use a case where one sale or a handful of sales is actually irrelevant. If there are only a handful of sales, but they are consistent, that is the value. If there are a large quantity of sales and a handful that fall outside the range of the majority, the majority is the value, not the outliers.
Of course, that may actually be the value for Hulk 181 in 9.2 going forward, but that remains to be seen.
Again, now everyone is trying to use the "but it's scarce" argument to their advantage, and hulk 181's greater numbers in grade to its potential disadvantage (other sales at 9.2 possibly diluting this high sale), when that is in fact the problem in the first place, per the OP's original post. No, three sales in ten years don't tell me anything definitive. But that Hulk 181 sale just happened. If two more like it happen in the next nine years would that prove a "trend" to you like it evidently does for Cerebus 1?
-J.
You can't solely rely on GPA data, especially in a discussion about a list found in the Overstreet Price Guide. GPA has only been referenced because it is the most obvious available data.