I hate to be the buzzkill, but it really does not work that way. Your soul is not a commodity you can exchange for a blank check in life. Here, check this out:
If you are going to work with King Paimon my best suggestion would be to get any ideas of getting what you want without a good amount of effort on your part out of your head now. But if you are in it for the long haul He is great to work with.