There is a signed copy of John W. Campbell, Jr.’s Who Goes There? for sale on eBay for $1,500. This is the story that the movie “The Thing” was made from. Campbell, of course, did more to shape modern SF than anyone and should be remembered for his work as an editor. I am not such a big fan of his fiction, though.
This is an historical book and I think $1,500 is cheap.