If all you are getting is scammers, ignore them and consider editing the ad content for more appeal or consider lowering the price until you get actual interest. Don't give up if you actually want to sell it. This site is as good of a platform to find buyers as any others. I am a paying member of this site and have sold nearly 150 items, with little issues. When I get a bogus response, I just look forward to the next real potential buyer. I have sold 2 big dollar items on this site since the beginning of this year.
Now this part of the forum is not near as good as the classifieds. Not much traffic.