I just noticed this today. Don't know if it is a sale price or a permanent price drop but it's currently 29.99 and in-stock now. Just ordered my copy.
Update: It is a price drop as of today. Here's the link.
http://www.gamestop.com/Catalog/ProductDetails.aspx?product_id=75003
Update: It is a price drop as of today. Here's the link.
http://www.gamestop.com/Catalog/ProductDetails.aspx?product_id=75003