Sorry if this is a repost - I didn't see it in the mess of Portal 2 threads. The $35 Amazon price is still better for the consoles, but I'm sure somebody would prefer to buy it from Best Buy.
360
http://www.bestbuy.com/site/Portal+...312186944&skuId=2146641&st=portal 2&lp=1&cp=1
PS3
http://www.bestbuy.com/site/Portal+...311132745&skuId=2146623&st=portal 2&lp=2&cp=1
PC
http://www.bestbuy.com/site/Portal+...311139568&skuId=2146696&st=portal 2&lp=3&cp=1
360
http://www.bestbuy.com/site/Portal+...312186944&skuId=2146641&st=portal 2&lp=1&cp=1
PS3
http://www.bestbuy.com/site/Portal+...311132745&skuId=2146623&st=portal 2&lp=2&cp=1
PC
http://www.bestbuy.com/site/Portal+...311139568&skuId=2146696&st=portal 2&lp=3&cp=1