siberianmoon
100+ Head-Fier
Those 3rd party sellers on Amazon offering these models for 50% off are either selling stolen merchandise or taking a loss. As an authorized Beyer dealer, I can tell you it costs me much more than that to get units in stock and Beyer has a strict Minimum Advertised Price policy. I know many buyers don't really care if a dealer can actually make a profit on a sale, but this kind of talk is disheartening.
My guess is that they are simply fake accounts trying to make a profit by scamming people. Some months ago I was browsing Amazon.de and noticed these fakers around especially "selling" Beyerdynamic headphones. The shop name always had a message "contact me" suggesting that they want you to make the transaction outside Amazon so that there is no proof of deal and it's impossible for you to take any action against some random Nigerian scammer.
But what surprised me was that Amazon.de actively allows these scammers. Many accounts were months old and angry customers had even posted on their Facebook page (and presumably the official feedback channel) about them. Every single item on their shop page was at an impossible discount price.
There are a few reasons why I gave up buying anything from Amazon some time ago.