http://blogs.windows.com/bloggingwindows/2013/01/04/reminder-get-windows-8-pro-for-14-99-through-the-windows-upgrade-offer/
http://blogs.windows.com/bloggingwindows/2012/07/02/upgrade-to-windows-8-pro-for-39-99/
szvsz azért a 15/40$-os ár belefér a "jelentős" kategóriába
