JASEM: Just Another Shooter with Electronic Music [90% off -> accept csgo cases & trading cards]

https://www.steamtrades.com/

Go somewhere else if you want to trade. And maybe read the guidelines again.

From the site guidelines:

This site is not for trading, so do not attempt to directly trade games or other items with users in our community

You should close this discussion thread if you don't want to get your account suspended

View attached image.