Comparison Site

I am looking for a author to produce a website for my company. The basics of the website is a price comparison site with items uploaded to it via a simple client web based interface. With the items uploaded a user may then browse/search for items by a variety of criteria. Must facilitate user and client log ins as well as client upload and CPC rate by item by category type. Would like a front interface similar to [login to view URL] with a query result output similar to kelkoo.co.uk. Scripts must be html/PHP db must be mysql. Ownership of all scripts will be transfered to me on project completion. The user interface for the uploading of items and tracking of hits and CPC's would be similar to that used by amazon in its market place. I have sample pages set up already that i can provide to suitable candidates. Much more to add in terms of a specification. I am very clear about what i need. Look forward to hearing from you.