Okay, this could be an interesting one.
Someone trying to sell the copy of the Diamond Previews catalogue withthe listing for Walking Dead #1 as the first appearance of the comic book. Which, technically, I suppose it might be. Though currently at 99 cents on eBay, no one is biting. Yet.
It does however include that "Walking Dead is TM and (c) Robert Kirkman & Tony Moore" line that caused certain legal headaches in recent years.
As a piece of archival history? How much?
UPDATE: That was fast! Suddenly up to $23. This is now a genuine collectible!