Well, Steam doesn’t provide such an option. In general, as far as I remember, there you can only give a skin or exchange it for another skin, if I’m not mistaken. However, you can use third party services like https://dmarket.com/ingame-items/item-list/csgo-skins/rifle/ak-47 to buy skins. I really like the Vulcan skin for ak47. What do you think about it? I think this is a worthy purchase.
To be honest, I don’t quite understand what is the point of cs go skins and ылins of other games? It’s a useless waste of money. In general, I don’t really like online games. Unless this is an option where I can have some rest. Now I prefer to play solitaire, and on one site I found interesting games with explanations on how to play. It brings me more pleasure