Csgo Jackpot - Cost.php - Price 0?

[Nyyriki]

I got bot working, finally. And everything gets into the pot on my website with correct images, the prices of the items is just 0... because of corrupt cost.php can anyone help?

<?php
$item = $_GET['item'];
$item = str_replace("\"", "", $item);
$item = str_replace("\'", "", $item);
$item = str_replace(" ", "%20", $item);
$item = str_replace("\\", "", $item);
@ ("set.php");
$rs = mysql_query("SELECT * FROM items WHERE name='$item'");
if(mysql_num_rows($rs) > 0) {
	$row = mysql_fetch_array($rs);
	if(time()-$row["lastupdate"] < 604800) die($row["cost"]);
}
$link = "http://steamcommunity.com/market/priceoverview/?currency=1&appid=730&market_hash_name=".$item;
$string = file_get_contents($link);
$obj = json_decode($string);
if($obj->{'success'} == "0") die("notfound");
$lowest_price = $obj->{'lowest_price'};
for($i = 5; $i < strlen($lowest_price); $i++) {
	$lowest_price[$i-5] = $lowest_price[$i];
}
$lowest_price[strlen($lowest_price)] = 0;
$lowest_price = (float)($lowest_price);
mysql_query("DELETE FROM items WHERE name='$item'");
mysql_query("INSERT INTO items (`name`,`cost`,`lastupdate`) VALUES ('$item','$lowest_price','".time()."')");
echo $lowest_price;
?>