Best way to make members aware of someone ripping people off in trading section?

Well, the guy has been a member for more then a year, has almost 200 posts, and several positive feedback. Not the stats someone who usually scams.
I agree it doesn't seem like the MO of a scammer (and I understand that the forum is just a device to unite parties and ultimately admin isn't responsible), but from the two responses that I HAVE received, the seller chose NOT to apologize or state their inability to complete the transaction but instead sounded very much capable. I'm just siding with the OP to help warn other potential buyers. I've already considered my funds lost and am chalking it up to experience. As anyone can tell I don't have many posts on the forum and truthfully I initially only signed up for the purpose of purchasing this headlight bezel for my car.