Silver for money, A.V.; to obtain the gift of God for that the gift of God may be purchased, A.V. (rightly, κτᾶσθαι is the middle voice). Silver. This is a change of very doubtful necessity; ἀργύριον, like the French argent, is frequently used for "money" generally, without any reference to the particular metal of which it is made.
Sometimes, indeed, it is used in opposition to "gold," as Acts 3:6 and Acts 20:33, and then it is properly rendered "silver." Here the Revisers' mason, doubtless, was to reserve "money" as the rendering of χρήματα (Acts 20:19, Acts 20:20).
St. Peter's answer is remarkable, not only for the warmth with which he repudiates the proffered bribe, but also for the jealous humility with which he affirms that the gifts of the Spirit were not his to give, but were the gift of God (see Acts 3:12-16).