get_posts error

Hi guys is a while since I’m stuck on this thing and I can not see where the problem is ..
the function has to give me as a result of all the articles that are in the category x, y and custom taxonomy (if y has subcategories should also search in subcategories), and have the meta key price between a and b

this is the code I used

$regione=isset($_GET["reg"]) ? filter_var($_GET["reg"], FILTER_SANITIZE_STRING) : 0;
	$provincia=isset($_GET["prov"]) ? filter_var($_GET["prov"], FILTER_SANITIZE_STRING) : 0;
	$cittaa=isset($_GET["cit"]) ? filter_var($_GET["cit"], FILTER_SANITIZE_STRING) : 0;

	$citta=$cittaa;
	if (!$cittaa){$citta=$provincia;}
	if (!$provincia && !$cittaa){ $citta=$regione;}

	$pmin=isset($_GET["pmin"]) ? filter_var($_GET["pmin"], FILTER_SANITIZE_STRING) : 0;
	$pmax=isset($_GET["pmax"]) ? filter_var($_GET["pmax"], FILTER_SANITIZE_STRING) : 99999999999;
	$categoria=isset($_GET["cat"]) ? filter_var($_GET["cat"], FILTER_SANITIZE_STRING) : 0;

	$args = array(
		'post_type'        => 'post',
		'post_status'      => 'publish',
		/*'posts_per_page'   => 6,*/
		'category' 		   => $categoria,
		'tax_query' => array(
			array(
				'taxonomy' => 'location',
				'field' => 'id',
				'terms' => $citta
			)
		),
		'meta_query'       => array(
			array(
				'key' => 'prezzo',
				'value' => array( $pmin, $pmax ),
				'type' => 'numeric',
				'compare' => 'BETWEEN'
			)
		)
	);
	//print_r(array_values($args));
	$posts=get_posts( $args );

this is the link gustadare.it/locali
the offending box is on the right of the page

I can not see the problem …