Wordpress custom post type

hello i have post_type "product" and taxonomy "price" can someone help me to query that custom post type with the selected taxonomy?

my current code is like this

<?php $term = get_term_by( 'slug', get_query_var( 'term' ), get_query_var( 'taxonomy' ) );
$args = array(
 'post_type'   => 'product',
 'posts_per_page' => 5,
 'tax_query' => array(
    array(
      'taxonomy' => 'productcategories',
      'terms' => $term->name
    )
  )
 );
 query_posts($args);
 print_r($args);
 ?>

but nothing on result, can someone help me? thank you