I agree to a point, I think that your example is not the case with the higher grade silver age keys, I think the numbers on these books are low and most are in collectors hands , I feel like flippers are not taking the risks on mega high value books. Dealers on the other hand definitely are responsible for some of the churn. I know there are a couple high value flippers , even here on the boards there are a couple, but not enough to really effect the higher grade market. higher grade silver age keys are pretty rare comparably. What if we are not in a bubble? what if demand for these books is real and here to stay? The internet and some big businesses are hinting that this is not going away. If you got into major comic keys in early 2000 you are sitting pretty, but even 2011 looked like a great entry point and I think Key books were severely undervalued. Who knows , even a clock is right 2 times a day .