So, thinking about the next couple of weeks in Kong Zhi's life, I'm thinking that we need money. There's the money that we owe for our pills, the money I would like to have to get us patched up from broken ribs (I don't think Elder Siani is courteous enough to give us 2 weeks of non-strenuous activity), money I would like to have to shop for more mats to craft a nice axe, and the money I would like to have to dive into the archives (both for time research and Kukuni research... which might be helpful in communicating with the Hammer of Mughi).
Now, I know we are getting some money for the charm we crafted for Xun Yu, but I don't know how much money that is or if we will get enough of the money fast enough to start dishing out for all our expenses.
My thought, then, is that selling the Vitriolic Retort is looking very appealing. I don't remember it doing all that much in our expedition to the Ghost City which is a mark against keeping it in my opinion. However, the price to sell it is probably boosted because of our win in the Charm duel, the fact that this charm was in said duel, and because as new eighth circle members there will likely be new duties and dangers which could entice people to buy a charm to shore up a weakness.
I was also wondering if it would be possible for us to sell the knowledge of Blooming Spear of the Auroch to the Sect Library. We did develop it from studying an Earthroot Ox, which means it didn't originally come from the archives. Furthermore, it is certainly not going to be a secret anymore after using it during our expedition down to the deeps. The problem is... it probably isn't all that special or unique given the breadth of arts available to the sect and I find it hard to imagine other artists wouldn't have been inspired by the Earthroot Ox long before we came around.