Collecting old books is one of the highest "adventure to effort" ratio endeavors, the closest one can approach to breaking the Dixie Flatline out of the Sense/Net Pyramid; it will be interesting once digital archaeology extends to resurrecting "old LLMs".
The author of this article, Andrea Mayes, also wrote The Millionaire and the Bard: Henry Folger's Obsessive Hunt for Shakespeare's First Folio, a book which goes into fascinating detail about the Folgers' quest for first folios and the adventure of building the library.