Over the last 6 months, I have been contacted by what I believe to be the same individual posing as someone else, usually a random call sign issued to a wealthy DX'er who wouldn't be answering my posts for sale or want ads. Peculiar but synonymous to this person is their use of language in the emails. This person "seems" to be from the UK or thereof. The syntax and grammar points to this. If I could figure out the IP address of these emails, perhaps I can forward it (or them) to our Classifieds manager.
Another detail I should point out, is that every single time I posted an ad, the reply came within 15 minutes. Once when this person replied with an item for sale that I was wanting, attached would be a stock photo easily found on the internet. Stupid. This last time, I requested a photo of the item with a hand written note of his call sign in the photo and the IP address. No reply. Of course.
If something looks funny about a reply, it probably is fake. Typing in all caps or the name in the address header being in all caps is clue for sure. The last email I had from this "bloke" was obviously all cut and pasted from QRZ and the usual Gmail account, which is free. The call sign holder doesn't have an email account listed on his QRZ page.
These clues usually jump out with a red flag. Good luck and don't get hosed by these crooks and by all means, report each incident here on Eham and elsewhere.
73, de Billy N6YW