Selling MSDN keys / accounts violates Microsoft's ToS. When you agree to the EULA, you agree to a legally bonding contract.
I kinda feel sorry for all your buyers as Microsoft could ban your MSDN account and all the keys would be blacklisted. Which means ALL the current activations would eventually show pirated windows.
Hmm! Based on what you said here ... I sold the account keys in MSDN...I do not sell keys MSDN.
Keys working 100% and genuine....Are not blacklisted.
The best way is you take a look at the feedback from the customer and my partnersBought Office key and - it just works - added trust - many thanks
I can confirm my key worked fine and I would deal again... never seen any (unresolved) problems reported here...