Custom field problem

How Can I get a ReviewAZON_LowestNewPrice field to be checked if price field is empty using the code below?

And if the ReviewAZON_LowestNewPrice field isn’t empty then display it.

<?php if(get_post_meta($post->ID, 'Authors', true) == '') { ?>

			<?php $price = get_post_meta($post->ID, 'price', true);
			 if ( $price ) {
 echo '<span class="price-tag">	';
		}
else {
echo '<span class="band2 outofstock2"></span>';
}
?>	

			<?php if(get_post_meta($post->ID, 'price', true) != "") { ?>
<span><?php echo $Price = get_post_meta($post->ID, 'price', true); ?></span>
<?php } ?>

<?php } ?>