Even better, for a limited time you can pre-order from certain retailers for 50% off.
CAG link:
The program kicks off tomorrow, June 26, in the United States, Canada, and Japan. Its scheduled to end July 11 in the U.S. and Canada and on July 5 in Japanor while supplies last, Microsoft notes.
* The discount is 50% or more over the normal estimated retail price (ERP) of the two mainstream consumer editions. In the
United States, youll be able to buy a Windows 7 Home Premium upgrade for $50 or get Windows 7 Professional for $100. Outside the U.S., Microsoft says, the special low pre-order price will vary by country.
* The offer is available online at Best Buy and Amazon.com. The online Microsoft Store will match these discounted prices instead of sticking with the full list price.
Note: yeah, I submitted the CAG link, but I read through this thread this morning and remembered people asking about an OS. $50 for Win7 Premium is a darn good price.