So... It has regional restrictions... The user SickGaming checked because tech support didn't answer... Key is only for Russian Federation...
However it's a good opportunity to cash out money from Steam and invest in a good game...
I got a reply from GOG technical support: "If the key starts at K5 means it can be activated only in Russia and the countries of the former Soviet Union. After activation, there will be no restrictions, so that I would advise you to simply log on to his account, activate game and he will have access to it." You don't have to worry about your account. Especially if you have only free games. ) I have my own. So... you know where you can find me. )
I don't lose hope! ) So I changed the number of keys that I want to receive in exchange.
The Witcher 3 CD-key for GOG
9 TF2 Keys / 8 CSGO Keys
I realize that I'm new here, so I will send key first, but only if you have 30+ positive feedbacks. It's a key from RU dvd-box edition, but I don't think that the key has regional restrictions. However I wrote to technical support to find out whether this is so. But there is no answer for a week. And in any case, you can check it by yourself. ) I'm not interested in games, only the keys. Because the summer sale is coming. ) I understand that after purchase of keys like the other items from market keys will not be tradable for one week, so I can hold the key for a week for you. Contact me here.