$args = array(
                                            'post_type' => 'product',
                                            'posts_per_page'=>3,
                                            'product_cat' => $term->slug,
                                            'product_tag' => "kennys-picks",
                                            'meta_key'       => 'total_sales',
                                            'orderby'        => 'meta_value',
                                            'meta_query' => array(
                                                array(
                                                 'key' => '_visibility',
                                                 'value' => array( 'catalog', 'visible' ),
                                                 'compare' => 'IN'
                                            ))
                                        );
                                        $sub_query = new WP_Query( $args );