Here are a few ninja tricks.
1. any e-mail keeps the persons IP address in the header, though this is not usually in the default view, it is easily enabled.
example
From:
[email protected]
Subject: ADC News #434
Date: February 19, 2005 4:28:34 AM CST
To:
[email protected]
Return-Path: <
[email protected]>
Envelope-To:
[email protected]
Delivery-Date: Fri, 18 Feb 2005 22:29:50 -0600
Received: from [17.254.6.6] (helo=chatbox-smtp-out1.apple.com) by hidefwebdevelopment.servermatrix.com with esmtps (TLSv1:AES256-SHA:256) (Exim 4.43) id 1D2MFa-0003s0-M6 for
[email protected]; Fri, 18 Feb 2005 22:29:50 -0600
Received: from napoli.apple.com (localhost [127.0.0.1]) by chatbox-smtp-out1.apple.com (8.12.11/8.12.2) with SMTP id j1J4C2pc000181 for <
[email protected]>; Sat, 19 Feb 2005 04:28:34 GMT
Message-Id: <xxxxxxxxxxx>
Content-Type: xxxxxxxxx;
charset="ISO-8859-1"
Content-Transfer-Encoding: 7bit
Mime-Version: 1.0
X-Mailer: MIME::xxxxxxxxx
X-Broadcast-Id: xxxxx
X-Sent-To: xxxxxxxxxx
if you look on the 5th or whatever line you can see the IP it comes from. Check that against this link http://www.geobytes.com/IpLocator.htm?GetLocation and you can see if people are in fact where they say they are from.
2. If you are dealing with a small ticket item use a service like paypal (they have consumer protection services), or if it's a big ticket item use an escrow service. There are plenty on the net, but some are just as shady as the people that may rip you off, so ask your bank for a suggestion.
3. There is a difference between a cleared check, and the transfer of funds. Ask your bank to expedite the transfer of funds, or at least notify you when it does happen. This is how people get screwed in the scams where they send you X and you sent them back a portion of X.
4. People are often too shortsighted to invest months of posts into ripping someone off. If someone has a longer track record on a forum they are more apt to be legit.
...I've sold transmissions, wheels and the like, and I've never had a bad experience, but I've always been cautious.
-Matt