However, each time you fund your wallet, the minimum amount of funds that you can put in your Steam Wallet is $5 / £4 / 5€ to keep transactions and payment service provider fees to a minimum.
Is $5 really a micro-transaction?
Is $5 really a micro-transaction?
Apparently you can buy gear. I haven't played TF2, but from my "too many" TF days, there were many times I'd have gladly payed $0.10 to see a sniper lagged for just 200ms.