How to track Ebay with Analytics?

Anyone knows if there is some way to track the Ebay listings with Google Analytics?
As is impossible to add the tracking tag in the Ebay site, I'm thinking that maybe there is another way like some script or something. I've been doing research on Google but I couldn't find anything. Is strange that sellers are not analyzing their listings... I don't believe it. Probably I'm missing something. Any suggestions?? Thank you.

Hi there, any luck on this ?