Add code inside listing wrapper to achieve http://codepen.io/anon/pen/pvPaaW

idx-plus-add-code-inside-listing-wrapper.php

<?php
/*
* Plugin Name: IDX+ - Insert Ribbon HTML Into Listings 
* Description: Print the ribbon HTML inside the listing wrapper for search results
* Version: 1.0
* Author: Katz Web Services, Inc.
* Author URI: http://www.idxplus.net
*/

// Available since IDX+ 2.4
add_action('idx_plus_results_before_listing', 'skyvillage_add_ribbon_to_listing' );

/**
 * Print the ribbon HTML inside the listing wrapper
 * 
 * @param array $listing Array of listing data, like price, lot size, etc.
 */
function skyvillage_add_ribbon_to_listing( $listing = array() ) {
	
	// Not sold
	if( !isset( $listing['status'] ) || strtolower( $listing['status'] ) !== 'sold' ) {
		return;
	} 
	
	// The rest is sold
	?>
	<!-- You can insert HTML code here -->
    	<div class="corner-ribbon top-left sticky red">Sold</div>
    	<!-- /end new code -->
	<?php
}