Hi,
I have developed a similar project in the past using C# Programming Language and MSSQL DBMS. The system scrape the cars details (make,model,years, specs,price, etc) from some USA websites like OVE, Manheim,SmartAuction,DealersLink, OpenLane,ADESA, etc.
My bid is not final because I don't know the details of this project. If you're interested, I'm available for to discuss.
Thanks