After searching for a used car inventory and sales system, I could not find exactly that fits to our need. However, we have identified a MS Access based system which we need to clone and modify as per our request.
I prefer to have this as a web based system, if it is not possible then I have no problem doing it in MS Access, Delphi or VB.
If you have time and skill for this project, please find the attached project requirement in Word.
Then if you think you would like to learn more on this project, I can send you the Access application to have more idea.