This is at least the third of fourth of these sorts of threads on here that I've seen. Its very common to see a new seller pop up with a bunch of copies of some new game or system that they know will sell out quickly, thinking they can get their money and get the hell out before Amazon catches them.
I didn't check, but unless the seller only has one system listed, its definitely a scam if they sell so far below the market value.
Amazon's a to z will cover purchases, but, as mentioned, it is usually a long process to get your money back. However, on the hardcore, obvoius scammers, they don't usually get to ever even withdraw any money from the sale (Amazon velocity sales limits), so the money gets back to you more quickly.