gistfile1.txt

add_filter( 'propertyhive_rex_property_request_body', 'request_sold_and_let_only' );
function request_sold_and_let_only( $data )
{
    $data['criteria'] = array(
        array(
            "name" => "listing.system_listing_state", 
            "type" => "in",
            "value" => array("sold", "leased")
        ),
        // uncomment the below if you only want to import properties with 'publish_to_external' ticked
        /*array(
            "name" => "listing.publish_to_external", 
            "type" => "=",
            "value" => true
        )*/
    );
    
    return $data;
}