There is a Trading Post. It is open to members after 30 days and acknowledgement of the rules for use of the Trading Post.

There are members who only come here for the Trading Post. If that is all you are looking for, may I suggest Armslist, Gunbroker, etc...

Also, there is a New Member Sign In in the General Discussion board. It is probably where you should have made your first post. Welcome.

https://www.ar-15.co/forums/97-New-Member-Sign-In

https://www.ar-15.co/threads/33477-R...e-Trading-Post