How are these CD-keys acquired and how can you guarantee their unhindered use?
These keys are original MSDN-keys, how grue said. The keys will not be banned by Microsoft, since they are legal.
For the first purchase, I will give the key to the person, he/she can test it and can then transfer the money.
[...]These keys are a dime a dozen, and aren't suitable for anything.[...]
With this keys you can activate your Windows over the internet and you will have a fully legal windows. Why there aren't suitable for anything then? They work like physically keys.