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Don't get it... Isn't TF2 free to play and available? I dont need any key to install Team Fortress 2... and yet so many ask for a key - can anybody enlighten me what's this about?
Thoese TF2 keys are used to open crates in the game. The crates (boxes) drop randomly and are locked - the keys on the other hand are buyable through the ingame shop and are needed to open them. Once you've done that, you have a chance to get a rare item from it ;)
So the community somehow managed to "make" those keys a currency :P
It's hypothetical, of course, I've never used such a key, nor will I ever do that - but other folks MIGHT :P
So, all in all, I'm wanting 2 keys (I don't need myself), which I can trade again for something someone wants 2 keys for :P
༼ つ ◕◡◕ ༽つ Hearthstone!!