Comment by rgovostes

I thought that, in light of this comment https://news.ycombinator.com/item?id=45621067, we're only a few days from seeing the solution. However, the auction now reads

> Upon being notified, the Smithsonian immediately sealed Sanborn's archives for 50 years to protect Sanborn's intellectual property rights.

Sanborn actually showed off some of his worksheets during a PBS interview years ago, which I assume are the same documents later given to the Smithsonian. At one point I looked into buying the B-roll footage to take a closer look at them, but I discovered enterprising Kryptos sleuths had already done so years before.