DleJAuto is package as a Component and Template all in one at a very reasonable price.

The Component has all of the features you need to list vehicles online.
Feature packed with Vehicles, Maps, Galleries, Dealers, and Categories.  It comes with a set of Modules that give you full control of your listings and book viewings.  Modules are an Advanced Search, Autos, Dealers, and Categories.

The Template allows the component to layout in a simple, user friendly environment and gives you full control of the way your site is presented in it's design with it's full features and layout builder.
Most of all lets not forget that you also have the amazing SP Page builder component to help design a wonderful site.