playing long campaign Venice, 1232, marriage alliance with Byzantium, just reconquered Constantinopole from Hungary and when trying to trade it back to my allies for another of their cities I can't: "not with your reputation" even if mine is "very reliable", and our diplomatic relations are very good. I need an astronomical amount + Constantinopole to get any of their city, almost like buying it directly. I remember getting better deals in vanilla with a faction's capital...
Any ideas, suggestions..? Thnx.