Oxygen Builder Repeater - Woocommerce Product On Sale

$args = array(
    'post_type'      => 'product',
    'posts_per_page' => 8,
    'meta_query'     => array(
        'relation' => 'OR',
        array( // Simple products type
            'key'           => '_sale_price',
            'value'         => 0,
            'compare'       => '>',
            'type'          => 'numeric'
        )
    )
);