I know it isn't a huge deal per se, but it's going for $45+ on ebay and Amazon and shows no sign of slowing. This might be worth it to some that don't feel like waiting til it hits $100+ or are looking to pick up an extra copy
http://www.gamefly.com/products/detail.asp?pid=120440&fcTrack=Store%20Page?Best%20Sellers%20For%20Sale
http://www.gamefly.com/products/detail.asp?pid=120440&fcTrack=Store%20Page?Best%20Sellers%20For%20Sale