Only dumbasses sell there souls. You may get what you want but it's always twisted and the eternal bondage is not worth it. And don't say you'll sell your soul to be immortal coz demons aren't stupid but you are.
If I could actually sell my soul that is undeniable proof that Heaven and Hell exist so really nothing is worth eternity burning in Hell for the fifty~ish years I'd have topside.
I would like to sell my soul on a new lease on life. After that, I'll die and say I don't believe in god and his hell crap and then be reincarnated because I'm a buddhist, not really.