Boyd,
Scammers will send you e-mails that look just like E bay, and they are trying to get your details out of you.
There was a thread about this before. I have had them myself, and I am registered with E Bay, but they sent these to the wrong mail address, so I knew instantly that it was a scam.
It is tricky but they do tell you on the site that you should never send personal info in reply to any mail request and E Bay will never ask you for personal info in a mail. i.e.passwords and real names etc.
I attended a conference once and the people who arranged it sold the list of delegates mail addresses, so I have had floods of scam mails on that address, which is why I no longer use it... lol.
But you just have to take care, as long as you are aware of these issues, selling on E Bay can be worth while.
It is better to be cautious than loose a load of money, and to take care of that I use a Pre Payment credit card with a limit on how much I place on there.