Phew, what you're talking about now?!? Blacklisted, whitelisted? Okay, a short Google research showed up a world completely new to me. But it reminded me to really having read some time ago, that Amazon supplies Kindle devices bought there "pre-registered" to the respective account.
As I've written already somewhere in this thread, here in Germany many, many, many Kindles are sold in non-Amazon shops ("normal" electronic marts, next to Kobo and Tolino ebook readers, and regularily located not far away from Android tablets in those shops

...). No need to ever "register" them with Amazon. Then such devices say: "My Kindle", instead of the Amazon account name. Okay, what is the state of such devices? "Blacklisted", "whitelisted"? And why shouldn't I be able to resell such a Kindle?

I have a valid bill/receipt from the mart displaying the serial number of the given device. Everything is fine, from the legal point of view. Due to strict privacy laws here in Germany, no one can be forced to register a freely sold electronic device with his personal name/account. Not with Windows PCs. Not with Kindles. With NO kind of hardware...

So once again my question: What's all this stuff with "blacklisting" and "whitelisting" about?? Could you clarify this a bit? TIA!