EncodedNybble on 24 May 2013
My comments about buying from non retailers stems from my assumption that the logic is as such:
Put disc into xbone
Checks if game is associated with a different account, if so, require additional $35 (or some fee sane as borrowing the game)
The only way to buy a used game and guarantee that the previous owner unassociated their account (and thus not pay double) would be to buy from a retailer since the retailer can unassociate the game itself. All person to person reselling would become untrusted and die. Bleh
