Good evening,
I played "Exile" when I was a kid, and I was thrilled to see it available as Avernum. Anyway, I seem to be unable to purchase the "Barter" skill from Tor. I did his quest, and the only thing he will teach me is "Cave Lore". What are the exact requirements? Or do I have to pick specific dialog options? I think I have tried every single one, and all of the online information basically boils down to "do the salamander quest and Tor will teach you barter for 150 coins".