How much is $100 dollar Steam?

Excuse me, could you please clarify what you mean by "$100 dollar Steam"? Are you asking about the value of $100 in Steam credit or the equivalent amount of Steam currency in another form of payment? It's worth noting that Steam is a digital distribution platform for video games and software, and it uses its own currency system, Steam Wallet funds, which can be used to purchase games, software, and in-game items. The value of $100 in Steam credit would depend on the current exchange rate between the US dollar and the Steam Wallet funds, which can vary depending on promotions and other factors. Could you please provide more context or clarify your question?