Here is another commercial theme that turns your website into a classified ads directory. Adifier is ready for KingComposer, Beaver Builder, and Elementor. It has a bidding system to enable your buyers to bid on ads. It supports bump up, featured listing, and urgent ads.
Adifier has an Ajax search function. It supports Open Street Maps. You can charge your users for submissions through packages, subscriptions, or a hybrid system. You can also make your site free to all. This theme has a messaging system built-in for registered users. Thanks to Map search functionality, your visitors will be able to find listings on a map. SpoonThemes is the designer behind this theme.