g2a question about sell games

XXX-XXX-XXX and steam gifts

You can do whatever you want, another thing that is against Humble Bundle ToS, but you still can if you want.

Thanks. And what for it CSV, TXT files?
i have many double games like this format ,Give this link to your friend'

Only steam keys & steam Gifts are allowed.Otherwise,The buyer will have the right to ask for a refund even if he activated the game.