This should answer the question of how much the silver was, in biblical context...
"Judas Iscariot’s 30 pieces of silver is so well known, so infamous in history, that it’s a euphemism for betrayal in Western culture. Have you ever wondered what those 30 pieces of silver were exactly - or how much they were worth? Scholars have debated these questions for years. Let’s go through some of their ideas.
The details of this story are found in the biblical book of Matthew, chapters 26 and 27. Before the Last Supper, Judas Iscariot, one of Jesus’s disciples, went to the chief priests and arranged to hand over Jesus to them, saying:
“What are you willing to give me if I deliver him over to you?” So they counted out for him thirty pieces of silver.
Later Judas, filled with remorse for his betrayal, threw the coins back at the priests in the Temple before he went and hanged himself. The priests decided that, as blood money, it could not be added to the temple treasury, so they bought the Potter’s Field.
The word the gospel writer Matthew used in Matthew 26:15 was argyria, meaning “silver coins.” This, obviously, is unspecific in terms of what kinds of coins they were. In 33 A.D. there were a number of possibilities for coins that might have been in circulation in Jerusalem, including:
Tetradrachms of Tyre, or Tyrian shekels
Tetradrachms or Staters of Antioch
Of these, Tyrian shekels had the highest silver content - 94% - so these were what the priests required as payment for the temple tax. This coin contained 14 grams of silver. Today’s spot price for silver is $.47 per gram. The silver in these 30 coins would be worth $197.40 today. The coins themselves, being ancient and historical, would of course be priceless, but at the time they were just regular silver coins used as instruments of commerce.
That $197.40 is a value out of time, however. You can’t just say that Judas betrayed Jesus for 200 bucks. The above coins vary widely in how much silver they contain, but you’d would also have to know the going rate for a man’s labor at that time and what the cost of living was in Jerusalem in order to determine how much money the chief priests paid for Jesus’s life."