Seems like a pretty good price if you've just built a new PC and can't use the upgrade paths. Was recently well received on here at £19
Description from site:
With Windows 10 Pro, you've got a great business partner. It has all the features of Windows 10 Home, plus important business functionality for encryption, remote log-in, creating virtual machines, and more. Get fast start-ups, a familiar yet expanded Start menu, and great new ways to get stuff done, plus innovative features like an all-new browser built for online action and Cortana, the more personal digital assistant.