I think your book is a perfect example of the fundamental change we're seeing in the demand and pricing of SA Marvels. In the past this book would have been much more desirable than the 5.0 that sold for $57K. It has a strong spine, crisp center image and clean back cover - and the Marvel chipping would, for the most part, be ignored by most potential buyers. The "structure" is exceptional. Unfortunately the chipping is not attractive, especially the nick at the top, and this detracts from the QP. Just as the 5.0 bidders ignored the BC damage, they will ignore how beautiful this back cover is if you were to sell it. I'm not sure what I'm describing is "fair" but quality of presentation of the front cover seems to trump all for SA keys in today's hobby. Of course the number on the front will be the overriding factor, but for the foreseeable future books with Marvel chipping will get hammered.