I have licenses for 'ClassiPress' (https://www.appthemes.com/themes/classipress/) and 'Motors' (https://themeforest.net/item/motors-automotive-cars-vehicle-boat-dealership-classifieds-wordpress-theme/13987211) themes for an automotive (car/truck/boat, etc.) buy and sell domain.
... and other addons), but it lacks the vehicle indexing capabilities of the Motors theme, specifically the dynamically populated dropdowns (demo at: http://motors.stylemixthemes.com/classified/). Site should be responsive.
The site should also be capable of selling automotive accessories (parts, tires, autosound, etc.) as well.