advert- and -bid site

I would like a successful team or freelancers to build a database driven web site via using PHP/ASP/XML etc. Example site is [login to view URL] it should let members post auto ads, manage bids and I should be bale to manage ad placement and payment process. If you have a sample site that I can do a test it will help me to conclude sooner. Good luck you all! It should not be crowded, but useful and functional. You may have your own script or a ready script after modification. Budget is not high because it is a side project. If working and good budget may be increased to 100-300 level for further work. PS: It should work in either server environment.