Not trying to revive this thread, but rather just give an update.
To recap - In February I purchased a used Bambi. A few days later, the warranty expired, and a few days after that, the converter went out and had to be replaced. I came to this forum for advice and was encouraged to seek compensation from A/S or the converter manufacturer.
After many unsuccessful emails and phone calls to both companies (Airstream and Parallax) I also wrote a friendly letter requesting partial compensation on the grounds that the there were so few days (3) between the warranty expiration and the converter failure. Although the letters were sent in early March, surprisingly, I have, to date, received no response from Airstream. On the other hand, the converter manufacturer, Parallax, simply mailed me a form that included their warranty policy that stated they only cover the original owner.
So, the outcome wasn't what I had hoped for especially because I thought there would be a little flexibility with respect to warranty expiration dates (I didn't think 3 days would be an issue). Even so, I appreciate all the help and advice from the folks on this forum, and I may still follow through on the suggestion to write to an 'advice column' of an RV magazine. Honestly though, I'd much rather just be camping. :-)