*Stands on soap box*
I realize some people are lucky online but they should do things slightly more fair...
1) If you have less than 500, do like Amazon does on black friday and give people ticket numbers and then generate who gets it later in the day
2) Release it at a time of day that EVERYONE is awake... noon eastern / 9 am pacific... it worked for the first Disney Afternoon set why wouldn't it work now?
3) Once it is in someone's cart, REMOVE IT FROM AVAILABLE INVENTORY!!! If you want, use the "ticketmaster" method of checkout where you have ten minutes.
We're talking about basic code implementation to do these things.
*gets off soap box*