I was the one running events at MegaCon this year and I can verify that it was near impossible to keep up with the demand for demos and product at the event. We already have a booth for 2013 in the Exhibit hall and will be in the gaming hall again of course.
GenCon was also wildly successful with tons of product flying off the shelf and countless people asking for demos of the game.
As a side note and to be on topic, you can also get decent single prices for The Spoils at clockmancardvault.com