והיה ערכך חמשים שקל כסף
Chazal (Megillah 23b) distinguish between arachin, valuations, which are a set amount established by the Torah, and damim, money/assessments, which are based upon a person’s worth (on the slave market). Horav Moshe Feinstein, zl, posits that the Torah is teaching us that two variant circumstances, conditions, determine how to view a person. First is a person’s established level – as expected of him, based on standards. This is similar to an established expectancy that at (for example) age 20, an individual should be proficient in various disciplines. At age thirty, he should have progressed beyond this to a different level….