I know, that's why I was saying that, $1 if I want it on steam, and I don't know if I have anymore cards with at least $1 on them.
Walk/bike/catch a ride to the nearest pharmacy/general store, pick up an American Express gift card or one of those online shopping cards (GreenDot or w/e) off the gift card rack, and put a few bucks on it
Bonus: Pay for part of it with the aforementioned cards that only have less than a dollar on them
This is, of course, assuming you don't have a parent who will let you use their card in exchange for the amount you will be using it for, but I'm guessing that's not an option for you if you're resorting to scrounging old gift cards for a few cents