How much was a talent worth in 100 BCE?

A talent is a measure that can be used for gold, silver, copper, or other substances. The ordinary talents (not for Temple-usage) weighed about 30 kilo. Let's assume that you're talking about silver. The silver talent had 3,000 shekels. Now you have to decide whether you're asking about today's worth (30 kilo silver at today's price) or its ancient purchasing power, which was quite different. A single silver shekel was enough to support a small family for about one week.