What to do about a shady trader?

[Daiszx]

First the back story:
I saw a post of someone with large armies for sale that said he would consider selling moderate sized chunks so I made an offer to buy about $65 worth. He said he was working on a deal for full army trades so I thanked him for his time. A week later he reposted so I again asked him if he was interested in selling that moderate sized lot and got no response. The third week he posted I again contacted him and began a negotiation to buy a few models for $75 shipped. I was very clear about what I was offering for each model, what I was willing to pay for shipping, and kept up communication on my end. As soon as we were about to finalize the deal he cut off communication. I tried to get a response from him with no luck.

Not communicating isn't a big offense by itself, but the way he acted made it seem like he was not interested in a fair deal and he certainly was not respectful of me. We didn't finalize the trade so I can't post a back-out but I got a very bad vibe from the whole ordeal and wanted to do something to raise a bit of a warning about the situation. He has one bad and one neutral feedback already (wasn't a problem since I have almost 4x his feedback and he would have shipped before I paid) and I just get the feeling he's trying to scam someone and disappear. Right now I'm only going on a hunch so I won't post the traders' name but I was wondering if anyone could help me find the right course of action to voice my suspicion without jumping to conclusions or making unfounded accusations.

[HarlequinZero]

Unfortunately, he may have rubbed you the wrong way, but unless he actually committed a backout or bad trade you can't name him. He may not have been polite in his communications, but he didn't violate any rules from what you've posted. If you feel he WAS possibly trying to scam people you can PM any member of the staff with all your communications and we can take a look at it. I can't guarantee you we'd find anything, but we take allegations of improper behavior seriously.

[Daiszx]

Thank you for the reply Harlequin.
I don't think he is actively in the process of scamming someone, but he seems to be on the lookout for the opportunity. He has a bad trade, a neutral, and at least one backout report on top of what I encountered. I don't want to ruin someone's reputation, but I also would rather raise a warning sign before someone gets burned. It's a tough spot to be in.