Gary Gudnason is deceased. So he won't be customizing any more knives. It appears to me that his knives with the relief carved bolsters are the rarest and most valuable. I'd wager that the dragon knife pictured might be his most valuable due to a combination of the amount of work (more than the one I posted) and the dragon motif (dragons being rather popular these days).
I saw the listing for it last night on the big auction site (appears to have been removed since), and the person selling it clearly didn't know what they had (they said they didn't know). I would have asked for twice what they were asking.
In the pictures on the auction site the word "Ghostown" was clearly visible on the edge of one of the bolsters (same on the one in my pics).