Ok first go to the Imperial Temple District and and a certain amount of fame then a dark elf will talk to you about some one looking for you and it gives you the quest called something about a bloodshrine or something it's a vampire quest so do the quest to the point where you go to the cabin and don't kill him let him live and listen to him the go to the cave and kill the high elf make sure to get at least 1 vampire dust then tell the guy you killed him go to the sancurary and he says he will give you money for every dust so dupe the dust as much as desired he give your 250 g for each so just dupe then get money!