system
A chat on subreddit /r/pcmasterrace
human
A friend of mine is studying insects.

He's been looking to obtain a very specialized book that's got about 1 copy left that's available in Europe. This very special book on the morphology of insect's legs is listed on two sides with automatic pricing algorithms that automatically adjust the price to be slightly above the other side's asking price (plus a little margin).

Thus, both sides compete to be the pick of choice adjust their price about once a week to be something like $25 above the other sides price; seeking to order from the other site and deliver to my friend when he finally decides to put an order.

This book that should be $80 by all reasonable accounts is currently listed as "available to buy. 1 copy left" with a price tag closing in on $13,000 on a mere two sites...
gpt
What book if you mind my asking?