Amazon originally only sold what product?

As of the writing of this article, Amazon is worth approximately $1.8 trillion. Its value can fluctuate billions over the course of the day, and no one even notices.

It's become so embedded in our daily lives, there are many items you simply can't even find anywhere else — and certainly not with overnight delivery so you don't have to head all the way to that grocery store three blocks away.

But back in ye olden days, Jeff Bezos had never gone to space and his charming little online business was a little-known seller of... what?

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