lol. It's like every time I log in there's something more to amuse me.
Nope, you're getting ripped off, kid. You can not sacrifice, consume, deteriorate, attack, use, or otherwise make use of anybody's soul. Basically you will hand him money and you will get a piece of paper saying you own something that you can not see, feel, hear, touch, or otherwise sense because he'll keep the soul. It is attached to him. You might as well be asking for his head, but I'm pretty sure since you would be able to watch him walk away with it attached he wouldn't agree to that.