High grade DC's have been heating up across the board (not just SC #4 or #22) but because supply is so sparse a small demand quickly equals an uptick in price.
I have no idea what this book will sell for but I wouldn't be surprised if it did well at auction. It is a highest graded copy of a legitimately tough book and a it is a DC key.
Yeah, I'm curious as well as to how the book will do in auction. I have no idea as well on what it will hammer. Yes, the book is a DC key, but I wouldn't put it in Tier 1 keys which I have reserved for SC 4, 22, and B&B 28 for DC SA only.