My goodness, would you look at that! Luckily the paperback is only 1% the price, so solid deal there!

I thought it's a data entry error, but no, it looks like that's the legitimate price range for the NEW hardcovers (the actual listed ones are even more!):

https://www.amazon.com/gp/offer-listing/B0007JVUSK/ref=dp_ol...

It's either a ripoff, or some sort of collector's edition original versions. Though if it were the latter, I'd have expected it to be advertised as such.

They’re priced by different algorithms that “outbid” each other.

Do they start them at $1'000 and let them bid down from there?

This isn't exactly related, but it's one of my favorite blog posts.

http://www.michaeleisen.org/blog/?p=358

One of the algorithms could be capped at $1000 for their inventory.