I have access to authentic product keys of many different Microsoft products. Before I write out a whole long list with prices, I'm wondering if the BitcoinTalk community would be interested.
Bitcointalk is filled with techsavvy people, so most people here know how to use loaders/KVM for microsoft products. The only use for "authentic" keys is for businesses, because their software licenses may be audited. If these "authentic" keys are academic/technet keys (or otherwise not for commercial use), they are worthless.