Is it safe to buy on G2A?
Yes, G2A is completely legal and reliable. G2A is an online marketplace where you can purchase Steam keys and other store keys for various video games.
Are Steam keys illegal?
There's nothing specifically illegal about buying/selling keys there, but almost all the keys are obtained via illegitimate means, in ways the developer or publisher didn't intend. If you want to get a game from g2a or kinguin just pirate it.
Can I sell Steam codes?
The only way that you can that sticks to Steam's guidelines is to convert them into game items (TF2 hats, CSGO skins, etc) and sell those on the market. Of course, this only works if you have the game as a giftable item.]]>