<VV> Corvair parts on eBay

[Clark Hartzel]

In the last few days I have tried to "ask a question" about some parts
on eBay and, after the usual "sign-in" process, a screen pops up wanting
my social security number and credit card information.  Is this a scam
or what?  I don't see why eBay would need this info to let me ask a
question about something for sale.  As long as I have a valid name and
password that should be enough.  Have others had the same situation?
Clark Hartzel