I would get in contact with Dave Foley, and he will get Ebay to shut the seller down. Since Dave apparently created Mame, and was tragically denied the copyright to the multi game enulator, his legacy lives on forever as being a decent and honest individual of the video game industry.
I think you can contact him via a prison in Nevada. Dave Foley knows all about the technical complexities of selling games on Ebay. I am sure he will revel at the chance to recreate his glory days, by assisting you.