New 500GB Bolts with All-In Included for $599 on eBay?

There are a few sellers on eBay selling new 500GB Bolts with all-in included for only $599. What is the catch? How can this be possible when all-in alone costs $550? Is this some sort of scam?

New 500GB Bolts with All-In Included for $599 on eBay?