My personal opinion would be, that classifieds can be used for selling or buying gear, as much as it's used for selling and buying records.
As for section for gear, I think those before mentioned forums are just a one mouse click ahead. In same way, as much as I could enjoy talking random BS or random music, I won't be inserting "misc" or "misc music" in this board. There are plenty of places to talk and I hope all the boards will have their own identity of some sort. Even after all the confusion recently, I don't think noisefanatics is there to stay and perhaps even grandmaster Greh is about to return? So:
-purely technical gear talk -> Check Noisefanatics gear for plenty of people who know what they're talking about.
-Ideological, spiritual and artistic gear talk = welcomed general sound discussion!