I would even suggest a small bonus for Kami/Kara in respective lands...and guild civ alignment. This makes sense as your more likely to get a "good deal" from NPCs who share similarities with you.
(ie...a Kami follower will more likely offer more to a fellow Kami than someone who he/she is at war with, likewise with civs.)
(ie...a Kami follower will more likely offer more to a fellow Kami than someone who he/she is at war with, likewise with civs.)