NO SELL has 2 problems imho, first that there is no real issue with the "lack" of income from it, second that you'll have serious problems with mansion upgrade points.. (you start with 20 and get 4 from a quest, I'm not sure that's enough fro all the main quest mandatory upgrades)
I mean.. who needs gold from slave sales when bandits can just gift you 10k+ gold in a single encounter ?
Mansion upgrade points on the other hand.. we really need an alternative way to get them..