Erm, obávam sa, že predávanie giftov je v rozpore s pravidlami...
May I Buy or Sell my extra copies?https://support.steampowered.com/kb_art ... -TPJL-2656
No. This violates the Steam Subscriber Agreement and may result in all involved Steam accounts becoming permanently disabled.
May I sell gift subscriptions?https://support.steampowered.com/kb_art ... #sellgifts
Steam Gift Purchases can not be sold. Attempting to sell a gift subscription is a violation of the Steam Subscriber Agreement and may result in your account being permanently disabled. You can trade gifts using our new Steam Trading system and can read more about that here.
V každom prípade by malo byť ok to vymeniť za nejakú inú hru, ako to robievame napr pri humblebundle...