Leon, it's not exactly the same thing, but I bought a raw Uzit on ebay. I had it graded, then put it in a bank for a few years. I never forgot that I had it, but for some reason I thought that it graded PSA 1. Four years later I took it out of the box to show someone. That's when I realized that it was graded PSA 4.5.
That was an excellent surprise.