How much is Steam $100?

Excuse me, could you please clarify what you mean by "Steam $100"? Are you referring to the value of $100 worth of Steam credit or some specific item or service on the Steam platform that costs $100? If it's the former, the value would simply be $100, as Steam credit is typically a 1:1 ratio with US dollars. However, if you're asking about a specific item or service, the value may vary depending on the item's current price and any discounts or promotions that may be available. Could you please provide more context or clarify your question?