Automotive Dealership Website

We are in need of a website for our business (car dealership). Main features are: 1. Users should be able to search two types of inventory a. our inventory that comes from a database,? and each car should have? pic gallery with 20 or so pics. Member area pass. protected **B. a wholsale search that pulls text vehicle lists? from? a 3d party? auction website (under secure login) and enables our MEMBERS? to search these listings (update once a week, around 6 lists of 2000+ vehicles each)** ? A similar site to what we want is www.exporttraders.com. Price is an important aspect at the moment, so not all features have to be done at once. We use [login to view URL] as our host. Will need design for the website as well.