How much will Vista cost? If you saw the Vista price list leaked last week by Amazon.com, you already know. The official Vista prices, which Microsoft made public on September 5, are the same as what ran on Amazon’s site. So what about the January 30, 2007, availability dates, also leaked by Amazon? Microsoft won’t confirm that as the official release date for Vista and Office 2007. But until we hear otherwise, we’re going with January 30 as D-day.