What are your favourite Japanese rock and metal?
metal is tf2 currency. most hats go for a little more than 1 refined, so having 5 total is a good start if you want to start trading.
Refined metal is pretty much the currency for high end items in TF2. It's better to find good items such as hats and miscs and sell those for refined metal or keys. But if you do have a ton load of scrap weapons and metal then do it if you want hats and such.
Uuhh...Bbuut....I suppose. The sport is like perhaps 10 bucks on steam now. So most often like 8 hats. Until you've got weapons with those special objects connected to it. Those that track kills, headshots, or different stuff. (seeing that these are typically the only things actually worth cash.)