Faust has been one of the more enrapturing tales of Western literature and stage theater. The discontented Faust striking a bargain with the cunning Mephistopheles. The tale has, indeed, been at the route of the pact with the Devil trope in Western literature. Under the lens of Scripture, however, to what extent is it fitting with soteriology (nature of salvation) and demonology (the powers and nature of demonic entities)? Truth be told, much of it, if not most to all, is divorced from any biblical exegesis. If one wishes to know the reason why, the article posted will explain.
You can't sell your soul to the devil because if you're not saved you're already going to hell. And if you are saved you belong to God. Your soul isn't something that can be bought or sold.
That is indeed the point of the article concerning the Faustian peril. While the soul cannot be sold, because the soul is either secured by God for salvation, or segregated to receive damnation, the peril of Faust is far more cunning. That people can, and do, deny Christ for the sake of preserving their wealth, status, or success, or even profane Christ for the sake of enriching their status quo. This peril is to convince man that this life is all there is, so you better make the most of it, in how they behave if not what they believe. We all must run from this peril; for even if we are saved through Christ, we will damn souls to Hell if we let the world bribe us into silence concerning the gospel.