At last check the knight corkscrew is up to 910$.
On the local corkscrew front, there is this little antique shop up the street that I didn’t even know existed, and I ventured out over the last couple of days to see what was there. And, there are corkscrews. The picture below is the most fascinating one. A signed J. Plant two pillar corkscrew! Unfortuntately the worm is short. I brought it home to take pictures, but am pretty sure it will go back to the shop. That is, unless, someone would like to make an offer for it–as the dealer gave me permission to ask around.