When Microsoft in July, announced its intention to offer a Windows 7 Family Pack, which provides for three upgrade installations of Windows 7 Home Premium edition for $150 or less, they warned that it was a “limited time offer.” Now, barely six weeks after Windows 7’s public launch on October 22, Paul Thurrott reports that “stocks of the Family Pack have disappeared in the United States. Amazon.com, Buy.com, and Newegg.com are all sold out, but various mom-and-pop partners of the sites are offering the package for $250 to $290. Even Bing Shopping turns up only one seller with the product in stock, at $272, which is nearly double its list price.”A Microsoft spokesperson said “The Windows 7 Family Pack was introduced as a limited time offer while supplies last in select geographies. Response has been very positive and in some cases, the offer has sold out. Customers interested in upgrading their PCs should purchase Home Premium, Professional or Ultimate upgrade products.”