I would like to use Noah's classifieds as the basis for a new site - Classified ads obviously - but I want to add a sort of ebay type feedback/rating things for buyers and sellers. Can this be done? It would need to work more or less like ebay does and possibly have little coloured stars etc.

I'd really appreciate any advice, help, script, adding to Noah's files etc etc.

I don't know what this sort of stuff costs etc but I'm open to suggestions.