It's not strictly legal to trade these without a licence, you know. But it's profitable.
Purchased for 4 pence, Sells for 2 pence
The sale of a soul
Not yours. You'd need a better price for that.
Deal with the Infernal Sommelier
They say that the Infernal Sommelier was a priest, some time before the Fourth City fell. The fellow certainly knows his souls. [This will always gain you Amanita Sherry. It may have other effects.]
A matter of luck: pretty good odds.
Unlocked with 50 x Soul
Offer a great many souls to the Embassy