Okay, upgraded to 0.18.2. Healing balm!
Purchase price: 18cb, sell price: 43cb

Three of them is 1gc, 29cb.
This time, the transaction price matched: 1gc, 29cb.

I do some crafting and go back. Purchase price is still 18cb, sell price is now 14cb (about 1/3 of 43cb from above).
Healing salve?

Purchase price: 55cb, sell price: 88cb
I’m guessing at this point that the sell price is supposed to be about 80% purchase price.
Again, the transaction result is the same as predicted by the screen: 1gc, 76cb.
I didn’t see any examples of the transacted price being lower this time around, so not sure if that was fixed in 0.18.2 or i just didn’t hit the right combo to get it.
Hope that helps!
ps- thanks for making the game! love it!