Okay, the FF 49 lobby clearly has no hesitation about expressing their opinion on this point. So if I understand what you're all saying, it's actually the FF 48 that's the anomaly, and the 49 and 50 numbers actually represent the norm? Unless you can tell me that FF 48 is a "warehouse find" issue like ASM 33, I find this hard to believe. I mean we're talking mid-run of FF and it's 1966, so buying patterns of FF and collecting patterns in general were pretty well established and I don't think anyone would have grasped the importance of the introduction of Silver Surfer and Galactus at the time (at least not to the point that they would have stocked up on WAY more copies of 48 than any of the surrounding issues).
Admittedly, I did exaggerate in my initial response, because on further reflection 91 9.4 or better copies of any silver age book is a helluva lot, so probably there won't be quite that many 49s and 50s out there. But a 9X or 10X differential? If not price (the demand side of the equation), what could account for such a huge disparity in the supply?