Compromising Documents - Ratket
From Fallen London Wiki
For compromising documents, it's probably always better to buy them directly at a 40% markup than to buy sherry and convert if your rat shillings per action is high enough
According to the current chart, at
30 - 4.91 - 30/7 = 4.28 40 - 6.06 - 40/7 = 5.71 50 - 7.07 - 50/7 = 7.14 60 - 7.94 - 60/7 = 8.57
Buying them directly breaks even between 40 and 50 shillings / action, which should be fairly easy for most mid-late game individuals