An attorney who works in contract and business litigation would be the type of attorney that you would generally seek for this type of a case.
However you should closely review the EBay Terms of Service and Agreements which specify that the venue of any such action will be in California and strictly specify the rights of EBay for dispute resolution. While you may have a claim as against the person defaming you, you most likely do not have a claim against the EBay.
Answered on Apr 21st, 2012 at 1:20 PM