Blog talk:Adnoam/Updates to Template:Item/@comment-44498734-20200821043522/@comment-36504000-20200821125444
From Fallen London Wiki
I don't know of any easy way to track besides just having every item, unfortunately.
I think there are some items you can only sell. While I haven't had the items to check myself, I've heard Final Breaths sell for 1 scrip, and Tailfeathers Brilliant as Flame for 5.