Gen,
I don't know if I mentioned this before, but another feature to consider would be a manual NPC selection feature to buy from Gypsies in Ilsh. They pop around, so you have to walk to them, but it would be cool if there was a mode that didn't do anything until you found the NPC you want to buy from, and then allowed you to run your buy by hitting a button and targetting the NPC.
Just a thought.
-P