Anyway. BI had a little article about how to find your very first order on Amazon, which used to be a PITA, but some years back Amazon made accessing older orders a smooth and easy process so it's not hard at all. Here is the BI piece.
And I thought, oh, hey! I can do that and it is another opportunity to be all gloat-y.
So here is a screenshot of my oldest order. I had attempted to special order it through University Books and/or Elliot Bay and either/both failed, so I tried to get it through Amazon.com (holiday present for then boyfriend; we both went on to be early employees of Amazon) and succeeded very quickly.