I'm actually buying one of these within the next 24 hours, but at that price isn't worth the huge risk of buying in this venue + losing all my money. I found a new 32gb for $476 shipped and you can just add on extra memory. I could go on but you have to better to tip risk vs reward ratio here.
FYI, I didn't read the large blurb of text maybe this includes a bunch of freebies and you've got a way to guarantee device is like you say it is.
There is a way to deal through escrow and if the item is not as the seller said then you have to make the statement in the beginning that if the item is not as described then you can return it but the seller should pay the shipping fee.