Currently being auctioned on eBay: 1931-59 FBI Agent Diary Collection of Meet Max H. Roder (1892-1988). A special agent who covered narcotics his entire 34 year career.
The collection consists of 28 diaries, kept on a day to day basis so he could recall things if he had to go to court. Current bid: US $394.00.
Link - via notebookism