I would personally think the chances of it being #2 are greater. I find it somewhat strange that NewDeal2014 received a random PM from someone whose identity he refused to release.
If you add this to the fact that he was refusing to use escrow, I would say it is pretty convincing that he was planning on scamming the entire time.
For what it's worth the seller seems reputable on amazon. I don't see them sending a battery. So yes, I changed my mind. I'm leaning more towards #2 now as well. Either way the amazon seller may have some interesting details to share with the party that actually got scammed.
I am not saying there are no scams on amazon, however I would find it hard to believe that the top search result for a S5 would still be in business if they were in fact scamming even a small percentage of their customers.
You also need to remember that the amazon seller is forced to use escrow via amazon. On the other hand NewDeal2014 refused to use escrow of any kind. Additionally NewDeal2014 is now claiming that the order was funded with stolen funds and/or the seller is participating in money laundering (really just trying to distract from the conversation).
PS. I do agree that posting personal details may be a bit premature.
The OP posted it in his first post so personal details are not new news.