The apostle Peter, hath given the best comment upon this, and other scriptures of the like nature, when he draws a line of everlasting distinction between redemption by money, and redemption by the precious blood of CHRIST. See 1 Peter 1:18-19.
Related Commentaries of Numbers 3:49
Numbers 3:49-51
49 And Moses took the redemption money of them that were over and above them that were redeemed by the Levites:
50 Of the firstborn of the children of Israel took he the money; a thousand three hundred and threescore and five shekels, after the shekel of the sanctuary:
51 And Moses gave the money of them that were redeemed unto Aaron and to his sons, according to the word of the LORD, as the LORD commanded Moses.