It is also carrier nonspecific and without a SIM card.
"Carrier nonspecific" is preferred, and generally costs more. This is called "unlocked" and means it can function on many carriers.
Why would you want the seller to provide a SIM card? That makes no sense.
I do not have time to view the other links, I'm sorry.
You should take the time to view your "competition", although, it isn't much of a competition if you're just charging more money without any history.
The price is more than fair in my opinion.
Your opinion is wrong.