Leviticus 27:3

“And thy estimation shall be, etc.] The estimation of the man himself that vowed, or of the priest for him, was not left to be made by either of them at their pleasure, but was to be made according to the following rules, in proportion to the age a person was of to be estimated: of the male from twenty years old even unto sixty years old: the account begins with these, because men of an age from the one to the other are fittest for labour, and therefore to be set at the highest price, as they are in the next clause: even that estimation shall be fifty shekels of silver, after the shekel of the sanctuary; a shekel was about half a crown of our money, or somewhat less, so that fifty of these…”

“Rather, When a man makes a special vow which concerns thy valuation of persons to Yahweh, if thy estimation shall be of the male, etc. The expression “thy estimation” is addressed either to Moses or to the priest Leviticus 27:12 : it denoted a legal valuation. The vow of a person was perhaps most frequently made in cases of illness or danger, under the impulse of religions feeling, either in the way of thankfulness for blessings received, or of supplication for something desired. A man might dedicate himself, his wife, his child, or his bondservant. This might have been an old custom; but the Law ordained that he who had taken such a vow should pay a sum of money to the sanctuary, determined…”

“Unto sixty years - Which is the best time for strength and service, and therefore prized at the highest rate. Leviticus 27:4”

“27:3-7 This section reflects social rank in ancient Near Eastern cultures. An adult man of working age had the highest rank, followed by an adult woman of working age. A boy ranked higher than a girl, and both ranked higher than toddlers. Senior citizens, who were past prime working age, ranked comparably to boys and girls. • The amount of fifty shekels (see study note on 5:15) would have represented about 20 ounces (570 grams) of silver, a significant amount. Comparisons with other literature of the time indicates that the biblical valuation is quite high and would have been out of reach for most people.”

“And thy estimation: Lev 27:14, Lev 5:15, Lev 6:6; Num 18:16; Kg2 12:4 \*marg. fifty shekels: i.e, At three shillings each, 7. 10s. sterling. after the: Lev 27:25; Exo 30:13 Leviticus 27:4”