Windows 8 Pro will be launched for $69.99. The OS will be priced at $199 after the promotional price expires on January 31st 2013. Microsoft will also offer a Windows 8 to Windows 8 Pro upgrade option at retail stores for $69.99 until January 31st when the price reverts to $99.99.
Microsoft previously announced its $39.99 Windows 8 Pro upgrade pricing for existing Windows XP, Windows Vista, or Windows 7 users a price available exclusively online for those wishing to download the software without a DVD option. Retailers will stock a $69.99 Windows 8 Pro option in stores, one that may be offered as a traditional full version of Windows for those without a previous copy. Both the Windows 8 to Windows 8 Pro and Windows 8 Pro copies will be made available from retailers on October 26th.
Source: The Verge