So - just to repeat it enough so it becomes common knowledge:
If you post a WTB or "looking for..." ad, and someone emails you directly, the first step is to search for any previous posts in this group.
If there are no posts from that email address that would fall under my personal "One Strike and You're Out!" rule.
If you still are not convinced, search for their email address in the Group Members section.
If they are not a member, or joined in the last few weeks, that would easily be a second strike (sorry about the extended baseball metaphor here...)
Finally, if you really feel they are an honest person, search their email address in google.
Which I just did.... and.... I've attached the result in a screenshot... Looks like he was trying to sell a big diesel tank as well.
That would seem to provide a SOLID strike three for this person.
Jim / list admin
"Trust, but verify"