Like an ebay

Hi Zenners!
I couldn't find this anywhere and didn't really know how to do a proper search. I have a client that will be selling autos online and they want a site that works like ebay. The user will pay a fee to advertise the car and then they can login and upload images and content about that car for other users and guests to see.

Cars.com has this kind of site now, but I am sure they had someone write the whole site for them.

We are thinking of using a separate tool for the uploading part and the zen cart for the payment. Does anyone have a better idea? Are there any modules of the zen that might accomplish the same thing?

Your thoughts on this issue would be helpful and appreciated.

Thanks a bunch!
Beo
:wacko: