Greetings! I'm going to attempt to answer your question as it seems sort of muddled. I can understand you wanting to figure out personal truths as they relate to your expression of spirituality and religion. I would not think that "selling one's soul" is really apt, unless you are approaching this from a "free will" standpoint where the soul/incarnation makes a decision to act in a particular manner, be that good or bad. I'm assuming in this case that the "selling" equates to the latter. I do not believe in purgatory, but I do believe that the soul goes to where it best resonnates to and that includes "The Pit" which is an absence of God and of Love. The soul cannot be destroyed as you cannot destroy energy, only transform it. Each soul has particular lessons that they came on board to learn. A soul who has opted to engage in very negative things will, if they are negative enough will find themselves in the pit which will take a very long time to emerge out of. If you are looking at a reincarnation standpoint, the checks and balances don't always occur in the lifetime that the person is currently experiencing. There has been recent studies since the 1980's regarding past life regressions and what happens in between incarnations. Souls don't just die and sit on some happy cloud somewhere, they continue learning and growing even on the astral. The ascended masters are those that have evolved to a point where no further incarnations are necessary. Buddah, Jesus, Mohammed are all examples of ascended masters. If you are trying to mesh belief systems together to form a new cohesiveness, than you have to really look at what you are attempting to learn or do, including further studying those aspects.