I became a vampire from the guy in the dark brotherhood. I didn't like the vampirism, so i sought out a cure. I did the cure vampirism quest, and when the count gives u the reward for helping his wife, the reward conversation is still there. I select it again and i get the reward again. i now have 200,000 gold! Woot!
I felt kinda wierd aboout the Vampire quest glitch. So I just did it a few times so he gave me 21000 instead of 7000 and bought the house in Skingrad. So instead of a glitch I pretend that he gave me a house for finding the cure. Thanks count!