An Street Spirit who, instead of selling items for currants, "sells" items in trade for other items. Similar to the Rube, but does not appear randomly. And shows up a pop-up dialog of his wares and the equivalent items needed to trade. For example, a meat collector could be brought in exchange for 50 potatoes.
I think this has been suggested before, but I can't seem to find the original post. Or I've read something that sounds similar somewhere within these forums. And I know street spirits will probably cease to be in the future, but I'm still putting this idea up in case the devs decide to retain (or modify) them.