get_post_meta in function.php

I have a function that pulls latest 10 entries from specific category and it works fine.

The problem is I have couple of custom fields for posts in that category that I’d like to be displayed as well but get_post_meta doesnt return anything?

Looks like this:

<?php
function get_phone_offers($cat, $showposts) {
?>
<?php query_posts("cat=$cat&showposts=$showposts");?>
<?php if (have_posts()) : ?>
<div class="table">
	<?php while (have_posts()) : the_post();
//	$thePostID = $post->ID;
$thePostID = $post_id;
.
.
.
	echo get_post_meta($thePostID, "Offer End", $single = true);
.
.
.
<?php endwhile; ?>
<?php endif; ?>
<?php } ?>