I agree that statistics play a significant role in determining markets trends, but that's not the entire picture. I believe that there are still FAR more uncertified copies of BOTH cents and pence copies of Hulk #1 out there in the collecting community, so going by CGC's census alone will only give you a portion of extant copies to draw your conclusions from (and we should probably include copies graded by other grading companies too). I think many other factors play into this subject. For example, many collectors may be bound to a budget when considering a key issue purchase and the price spread alone may influence them to purchase a pence copy over a cents copy, not because they prefer it, but more likely because it's what they can afford. In that particular case, one would be misguided if they believed the pence copy was purchased due to preference, rather than economics. Which brings up the point that nobody really knows for sure why someone purchases one version over the other (unless of course they TELL you). Also, some collectors don't buy or want their comics certified as they prefer to get their hands on them and read them. The copies they'd be interested in would be "undocumented" in the statistics you're using to draw your conclusions, but they are still every bit as much of a factor in the marketplace. Additionally, using quantified census numbers and inserting hypothetical guesses as to how many collectors want which books is far from a scientific process and would likely produce inaccurate results. I don't think that simply "crunching the numbers" will provide an accurate overall picture when trying to predict price increases in comics, especially when you're working with incomplete information. There are a lot of variables to consider. My 2c.