1. You can't trade if you're F2P, you have to buy something from the TF2 store first (it doesn't matter what it is, but you have to open your Steam account with at least $5), then you'll have a Premium account and you can trade.â Dan C Oct 16 '12 at 1:32.. You can't trade if you're F2P, you have to buy something from the TF2 store first (it doesn't matter what it is, but you have to open your Steam account with at least $5), then you'll have a Premium account and you can trade. â Dan C Oct 16 '12 at 1:32.