Simon becomes a convert for awhile, but judging by the negatives given about him in Acts 8, he ultimately became an enemy of the cross. He started turning bad when he offered money to have the power to impart the Holy Spirit with the imposition of hands. Peter rebuked him sharply: May your money perish with you, because you thought you could buy the gift of God with money! — Acts 8:20 NIV.
One thing is clear: you can’t possibly buy anything from God. You can’t buy your way into Heaven even with million dollar donations. Only Jesus could the insanely huge ransom for your and my soul. You can receive it freely, just like you receive freely the Holy Spirit. It is a gift.