Maybe the other way to approach it is something like this...
Send an email to Infogrames/Codemasters etc saying "I am selling some of your old games on a DVD compilation on EBay. I assume this is OK with you, please let me know if it is not. This is just a courtesy message" and put a link to the EBay auctions.
And let Codemasters etc go to EBay complaining about the auctions if they so desire. EBay would take more action if contacted from a big publisher than you would ever get!