In Acts 8 Phillip the evangelist goes South to Samaria and preaches the gospel. He does so with the power of the Holy Spirit, the result, people are saved and healed. During his ministry, he meets a magician named Simon. Simon was famous, proud, and deceived many people with his dark arts.
Simon heard the gospel, believed, and was baptized. Then Peter and John come down from Jerusalem to assist Phillip and pray for the new believers and they received the Holy Spirit.
This impartation was so powerful, when Simon saw it he offered Peter money to have the same power. What did he see that made him do this? We don't know exactly but it was probably the same manifestation as on the day of Pentecost in Jerusalem. The Samaritans probably started speaking in other languages and along with seeing miracles, Simon decided he also wanted this power and was prepared to pay for it. Peter quickly rebukes Simon and using a word of knowledge reveals his motive. 
What's the point? We better be very careful about our motives when it comes to God's power and money. As the church was being established in Jerusalem, a young couple end up dying because of a donation from the sale of a property. They publically proclaimed they'd give 100% of the proceeds but only gave a portion.
God's power can't be bought. God's power can't be sold. God takes generosity and integrity seriously. Over the centuries the Church has had some serious abuse of money and power. From indulgences in the Medi-evil church to the scandalous behavior of church leaders in the last 100 years, the inappropriate use of money and power has been a significant hindrance to the spreading of the gospel.
When you get the money you get power. We must always be mindful that we are just stewards of whatever God gives us and with it comes the responsibility to walk with integrity. God is always watching.