Skins for TM2

Guys, I have so many of these skins. I don't want to use them, I'm interested in the gameplay. Can I do something with them?

I don’t know, I don’t play games at all. What are skins? I've never met this name.

Well, this is something like objects for the appearance of the hero. They don't affect the characteristics of the character, they are just, say, beauty items. If you don't need them, then you can sell them at https://dmarket.com/trade-tf2-skins . There are instructions on how to start doing this, so you won't have any problems.