FYI
Saw the Season Four boxed set at Barnes and Noble today. $69.95.
You can buy it at Walmart for $45.37
http://www.walmart.com/catalog/product.do?product_id=4239598
And at Best Buy for $48.99
http://www.bestbuy.com/site/olspage.jsp?skuId=7480754&type=product&id=1487480