Selling keys of OS Windows
Keys completely legality, valid, are codes from subscriptions, selling strictly to one person, have no restrictions, they can be activated anywhere in the world
Can accept any keys (TF2, DOTA2, CSGO) can accept random in game items

Windows XP Professional (x86) - 5 keys
Windows 7 Professional - 15 keys
Windows 8.1 Professional 32/64-bit - 30 keys
Windows 8.1 Enterprise, Enterprise N, Pro VL, and Pro N - 35 keys
Windows 8.1 - 25 keys
Windows 8 Professional (x32/x64) - 25 keys
Windows 8 - 25 keys