This is just a warning. The eBay mail system REQUIRES you to sign in to reply to
an email purportedly from another eBay member. I just received such an email
asking about something I am selling. I am NOT selling ANYTHING. It was a
phishing attempt to get my user ID and password.
If you get a query that requires you to sign in, I'd use the 'Contact a Member'
function on the eBay site and NEVER reply to such an unsolicited email, unless
you are sure it's genuine.
Such phishing emails should be reported to:
spoof@eBay.com
-John