According to the page, only a "limited quantity" of PS4 units at the discounted price are available. More than 400 have been sold since the promotion went live. The deal ends on Monday, October 27, or presumably when stock runs out.
NewEgg's special PS4 deal is for the standard black console, not the white Destiny bundle. You're buying a brand-new PS4, which comes with the system, a DualShock 4 controller, an HDMI cable, a mono headset, and all power and charging cables.