There is a very simple legal way to approach this problem. File a compliant with ebay as copyright infringement (did you know that once you take a pic it is copyrighted automatically), that will get their attention. Second, while that process is going on use the contact the seller link and get her addy, send a certified letter to her notifying her of your intent to sue for copyright interfringement if she doesn't cease and desist within 30 days....most attny's will prepare and mail the letter for around 50 bucks......
Burly