It's for a great cause--to benefit Gene Colan--and if you have the money, you should bid on this item like crazy. Raise some money for Gene!
But how high do you think this item will go? Eight days left, and it's already well over $2,000? Do you think it will crack $5,000? $10,000? What's the precedent for this kind of thing? It's the notebook that outlines the ideas for the death of Captain America, but it's not like the character is going to be dead forever.
Has any other recent comic book writer ever sold a notebook before? If this thing sells for $10,000, will other writers start supplementing their income by selling their notes just as artists sell sketches?