public function prices()
{
$items = Items::whereRaw('not exists (select 1 from item_purchases where item_purchases.item_id = items.id)')->orderBy('items.price', 'ASC')->orderBy('items.category_id', 'ASC')->orderBy('items.title', 'ASC')->get();
return view('Items.prices')->with(array('title' => 'Items without price', 'items' => $items));
}
