Wow. Deal is DEAD already.
But what Amazon is giving you is CREDIT and if you're paying $16 in cash(plus tax for some, like me) from the site for the game that's not exactly a very smart way to flip games.
Now if you were paying say $5 a copy and then sending it to Amazon, THEN you might have some flippers/hoarders biting on this deal.
But believe me, paying almost as much in cash to make a piddily 'profit' in credit wouldn't be the MO of a smart flipper.
I don't disagree entirely, but it's not hard to see how spending $68ish now (based on average of $17 posted by others, plus 2 copies each version from Amazon max) would be worth the $80 if you were already planning or spending regularly at Amazon. 15% discount for virtually no work is a nice incentive for some (and based on how fast it went, what else could be the reason?)
Sure, it's not as awesome as $5 for $20, but what is?