Apple's exclusive developer's conference, World Wide Developers Conference (WWDC) is coming up in a couple months. Tickets just went on sale and sold out on Monday. The June 6-11 conference holds promise of "the future of iOS and Mac OS." This conference isn't open to the general public, each of the $1599 tickets must be paired with registration as an Apple developer. Enterprising scalpers have posted a number of these tickets on ebay today, Digital Trends reports.