Car Sales Website

I need to have a car sales website designed allowing customers to advertise their cars for sale. Within each listing, will have a link to insure the car, buy a car report, find car parts, buy on finance and cars listed as advertised by a dealer or private. Also the proximity of the advertiser to the car seller. The advertiser should be able to login and update their details. I will also like car dealers to login as they will have separate deals to advertising a block of cars for a subscription fee per month. Ability to mark cars as sold when sold and update by admin or seller. Integrate site with Protx payment module and Paypal website pro. I need this job done ASAP if at all possible, but done well with a clean and good layout. I have other projects to do as well.