Once you start the quests to get rare items (zepheri wraps, dynamite, rare gem) as soon as the first one drops you can drop a warp point and start just going back and forth between the quest givers and the dead mob cause the next item will keep spawning right there so long as you care to keep going back and forth. I played with it for a while just too see what happened and it seems like you can endlessly just keep going back and forth between the quest givers and your warp point, pick up the item spawned from the dead mob, and go turn it back in again.This chain seems to only end if you neglect to find the next dude with the rare item quest.