Leslie, thanks so much for your reply. Yes, I thought that as well, better put my minimum price on my cards next time....
Just had the first meeting with the auction winners. I was not expecting them to take me up on it anymore, as so much time has passed since the auction, but I am happy to do it, as it will be good PR to have a portrait hanging on their wall. We're now in the stage of picking out photos, or maybe making them. This is the tough part.
Thanks for the tips.